{ "data": { "a": { "slug": "letta", "name": "Letta", "vendor": "Letta", "vendorUrl": "https://www.letta.com", "kind": "harness", "category": "agent-harnesses", "summary": "Letta, from the MemGPT team, is an open-source agent harness (formerly Letta Code) for stateful agents that keep memory blocks, skills and conversations across sessions, used from a CLI, chat.letta.com, messaging channels or the Agent SDK, with Letta Cloud.", "url": "https://www.anchorterminal.com/tools/letta", "markdownUrl": "https://www.anchorterminal.com/tools/letta.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/letta.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/letta.json", "dns": "letta.grade.anchorterminal.com", "repo": "https://github.com/letta-ai/letta-code", "license": "Apache-2.0", "transports": [ "stdio" ], "packages": [ { "registry": "npm", "name": "@letta-ai/letta-code" }, { "registry": "pypi", "name": "letta" } ], "auth": "mixed", "authNotes": "Local use needs only the user's own model keys or coding-plan logins through `/connect`. Signing in with Letta (`/login`, OAuth in the browser) stores agents in Letta Cloud and enables remote computers and secrets. Developer plans use Letta API keys.", "pricing": "freemium", "pricingNotes": "Free plan at $0 with bring-your-own keys and limited agents and storage. Pro $20 a month with Letta Auto quotas and up to 20 agents. API plan $20 a month plus $0.10 per active agent a month and $0.00015 a second of tool execution, with LLM usage at token cost.", "priceSummary": "$20 / mo", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the letta-code source, docs.letta.com's llms.txt or the pricing page (checked 2026-11-06).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 3793, "npmWeekly": 85863, "pypiWeekly": 2225, "asOf": "2026-11-06" }, "docsUrl": "https://docs.letta.com", "llmsTxt": "https://docs.letta.com/llms.txt", "capabilities": [ "agent.harness", "agent.mcp-client", "agent.multi-agent", "memory.store", "memory.search" ], "tags": [ "open-source", "local", "hosted", "freemium", "apache-2.0", "typescript", "cli", "headless", "telemetry", "llms-txt", "memory" ], "lastRelease": "2026-11-06", "graded": true, "anchor": { "graded": true, "score": 59.7, "grade": "C", "agentReady": false, "rank": 684, "ranked": true, "rankOf": 1486, "categoryRank": 18, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 67, "maintenance": 85, "payments": 60, "reliability": 58, "schema": 70, "security": 35, "transparency": 55 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-06" }, "negative": 0, "verdict": "Letta's open-source harness gives agents git-tracked memory blocks, skills, subagents and headless JSON runs, with a $0 plan and public per-agent API prices. It starts in the unrestricted permission mode, defaults to Letta Cloud, sends usage telemetry unless LETTA_CODE_TELEM=0 is set, and the V1 API server the comparisons describe is retired.", "bestFor": "Long-lived coding agents and assistants that keep memory and identity across sessions and machines.", "strengths": [ "Apache-2.0 harness on npm and PyPI with 0.34.42 released on 6 November 2026, and releases most days", "Memory blocks and MemFS keep an agent's context in git, with optional sync to the user's own repository", "Headless runs with `-p` and `--output-format json`, plus a TypeScript Agent SDK and a self-hosted App Server", "Public prices, a $0 plan with bring-your-own keys, and an API plan at $20 a month plus $0.10 per active agent", "Runs locally without signing in, with `letta backend local` or `--backend local`" ], "weaknesses": [ "The default permission mode is `unrestricted`, the renamed `bypassPermissions`, so tool calls aren't confirmed unless the user picks another mode", "Letta Cloud is the default backend, so agent memory and conversations go to Letta's servers unless the user chooses local", "Usage telemetry is on by default, with the LETTA_CODE_TELEM=0 opt-out found only in the source", "The Letta V1 Python API server is retired and unsupported, and the letta-ai/letta repository is now a landing page", "The privacy policy names no legal entity or date and says hosted message data may train future models" ], "agentNotes": [ "Start headless runs with an explicit permission mode such as `standard` or `strict`; the default auto-approves tools", "Pass `--backend local` for work that must stay on the machine, since Letta Cloud is the default", "Set LETTA_CODE_TELEM=0 in unattended runs if usage events must not be sent", "Use `letta -p --output-format json` for scripted runs and parse the JSON, not the terminal output", "Don't plan on the retired V1 REST server or `.af` AgentFile import; both are gone" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 59.7 } ], "editorialScores": { "ergonomics": 67, "maintenance": 85, "payments": 60, "reliability": 58, "schema": 70, "security": 35, "transparency": 55 }, "provenanceScore": 54, "checked": { "categories": { "ergonomics": "2026-11-06", "maintenance": "2026-11-06", "payments": "2026-11-06", "reliability": "2026-11-06", "schema": "2026-11-06", "security": "2026-11-06", "transparency": "2026-11-06" }, "last": "2026-11-06", "oldest": "2026-11-06", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "npm install -g @letta-ai/letta-code", "headless": { "local": "letta --backend local", "run": "letta -p --output-format json \"\u003ctask\u003e\"", "server": "letta server" } }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/letta" }, "alsoIn": [ "agent-memory" ], "area": "frameworks", "unitPrices": [ { "item": "Pro plan", "unit": "month", "usd": 20, "note": "Letta Auto quotas, up to 20 agents" }, { "item": "API plan active agent", "unit": "month", "usd": 0.1, "note": "Plus $20 a month base and $0.00015 a second of tool execution" } ], "provenance": { "legalEntity": "", "domain": "letta.com", "domainRegistered": "1997-10-01", "endpointOnVendorDomain": null, "terms": "https://www.letta.com/terms-of-service", "privacy": "https://www.letta.com/privacy-policy", "statusPage": "", "changelog": "https://github.com/letta-ai/letta-code/releases", "securityTxt": "none", "checked": "2026-11-06", "notes": [ "The privacy policy shows no last-updated date and names no legal entity, only Letta. It says hosted message data may be used to train new models and that basic telemetry can be turned off in settings when supported.", "www.letta.com and docs.letta.com robots.txt allow all crawlers.", "RDAP gives letta.com a registration date of 1 October 1997, which predates the company, so the domain was bought later.", "/.well-known/security.txt returns 404. SECURITY.md in letta-ai/letta asks for reports to support@letta.com.", "The terms URL is the conventional path and was not read; the policy reader checks it at landing." ], "score": 54 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/letta.json", "live": { "slug": "letta", "versions": [ { "registry": "github", "name": "letta-ai/letta-code", "version": "v0.34.43", "released": "2026-11-06", "seenAt": "2026-11-06T23:39:39.434291816Z" }, { "registry": "npm", "name": "@letta-ai/letta-code", "version": "0.34.43", "seenAt": "2026-11-06T23:39:38.413416142Z" }, { "registry": "pypi", "name": "letta", "version": "0.34.12", "released": "2026-10-12", "seenAt": "2026-11-06T23:39:39.241816797Z" } ], "githubStars": 3794, "npmWeekly": 85863, "pypiWeekly": 2225, "securityTxt": { "url": "https://letta.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T16:01:02.768002207Z" }, "llmsTxt": { "url": "https://docs.letta.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:52.28674296Z" }, "pages": [ { "url": "https://www.letta.com/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:30:46.549817082Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "947a68f3e3a0" }, { "url": "https://www.letta.com/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:30:48.740250784Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "63f31d6ebfb8" } ], "updatedAt": "2026-11-07T16:01:02.768002207Z" } }, "answer": "Letta scores 59.7 (C) on agent readiness against Warp (Warp Agent CLI and the Oz Agent API)'s 57.6 (C), and leads in 4 of 7 scored categories. Warp (Warp Agent CLI and the Oz Agent API) leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust.", "b": { "slug": "warp", "name": "Warp (Warp Agent CLI and the Oz Agent API)", "vendor": "Warp", "vendorUrl": "https://www.warp.dev", "kind": "harness", "category": "agent-harnesses", "summary": "Warp's coding agent, run interactively in any terminal as the Warp Agent CLI (`warp`), or started from scripts through the Warp Platform API (the Oz Agent API) and the legacy Oz CLI, on Warp-hosted or self-hosted workers.", "url": "https://www.anchorterminal.com/tools/warp", "markdownUrl": "https://www.anchorterminal.com/tools/warp.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/warp.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/warp.json", "dns": "warp.grade.anchorterminal.com", "repo": "https://github.com/warpdotdev/warp", "license": "Mixed. The client, including the `warp` and `oz` binaries, is AGPL-3.0 with the `warpui_core` and `warpui` crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0", "transports": [], "packages": [ { "registry": "pypi", "name": "warp-platform-sdk" }, { "registry": "npm", "name": "@warp-dot-dev/warp-platform-sdk" } ], "auth": "mixed", "authNotes": "A Warp account is required. The `warp` CLI signs in with a device code in the browser, or takes a Warp API key in `WARP_API_KEY` (or `--api-key`). The Oz CLI uses `oz login` or the same key. The API takes the key as a bearer token. Personal keys act as the user, agent keys run as one cloud agent on the team, and each key expires after 1, 30 or 90 days or never.", "pricing": "freemium", "pricingNotes": "Free is $0 with Warp Agent CLI access and limited cloud agent use, but no bundled Warp inference, so the agent needs purchased usage (at a premium on Free) or your own provider key. Build is $20 a month with $20 of usage at API rates, Max $200 with $200, Business $50 a seat a month with $20 a seat, and Enterprise by quote. Cloud runs add compute and agent-hour platform charges, and no agent-hour rate was found on the pricing page (checked 2026-10-18).", "priceSummary": "$20 / mo", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the docs bundles, the OpenAPI file or the pricing page (checked 2026-10-18).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-18" }, "docsUrl": "https://docs.warp.dev/agents/cli/", "llmsTxt": "https://docs.warp.dev/llms.txt", "openapi": "https://docs.warp.dev/openapi.json", "capabilities": [ "agent.harness", "agent.mcp-client", "agent.multi-agent" ], "tags": [ "official", "harness", "coding-agent", "cli", "cloud-agent", "mcp", "llms-txt", "openapi", "sdk", "python", "typescript", "status-page", "free-tier", "open-source", "rust", "telemetry-default-on", "pre-1.0" ], "lastRelease": "2026-10-15", "graded": true, "anchor": { "graded": true, "score": 57.6, "grade": "C", "agentReady": false, "rank": 782, "ranked": true, "rankOf": 1486, "categoryRank": 24, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 66, "maintenance": 84, "payments": 20, "reliability": 52, "schema": 89, "security": 52, "transparency": 69 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-11-04" }, "negative": -3, "negativeNotes": [ "-3, 6 May 2026, a released fix of Warp's own described flaw with no advisory. The release of 6 May 2026 fixed a command injection vulnerability when opening files in external editors on Linux, recorded as one changelog line with no advisory, CVE or affected versions (per the 18 October check, not re-read on 4 November). OSV lists no advisory for the SDK packages on 4 November. This run charges released fixes of a product's own described flaws with no advisory -3; the 18 October check charged 1. Dependency updates for GHSA-5pmw-9j92-3c4c (15 April), CVE-2026-50185 (31 July) and the September and October dependency fixes in the repository are not counted (https://docs.warp.dev/changelog/2026/)" ], "verdict": "The Warp Platform API has a public OpenAPI file, RFC 7807 errors with a `retryable` flag and Python and TypeScript SDKs. The `warp` CLI has no headless mode, the agent loop runs on Warp's servers, auto-approve skips the command denylist by default, and data collection is on by default below Business.", "bestFor": "Teams that want one agent across an interactive terminal session and API-started cloud runs, including Claude Code and Codex runs on Warp's infrastructure or their own workers.", "strengths": [ "An OpenAPI 3.0 file for the Warp Platform API with 293 schemas, and RFC 7807 errors that carry a machine-readable code and a `retryable` flag", "Runs can be started, listed, followed up, interrupted and cancelled over HTTP, with cursor pagination and filters by state, task status and name", "Execution profiles set shell, edit, read, MCP and child-agent permissions separately, and the default denylist covers `rm`, `curl`, `wget`, `eval` and `ssh`", "Weekly dated releases, 15 between 23 July and 15 October 2026, from an AGPL-3.0 client repository with CI on pull requests", "Cloud runs can use the Warp Agent, Claude Code or Codex harness, on Warp-hosted or self-hosted workers" ], "weaknesses": [ "The `warp` CLI has no print or headless mode. Scripts go through the legacy Oz CLI or the API, both of which need a Warp account", "Auto-approve bypasses the command denylist by default, and no local OS sandbox is documented for the CLI", "AI interactions and console inputs are collected by default on Free and on paid plans below Business, and the documented opt-out is in the desktop app", "The agent harness and Oz orchestration are proprietary and run server-side. Only the client is open source", "The install script checks no checksum, and no security.txt, bug bounty or SLA was found", "The terms forbid accessing the Services by robot, scraper or other automated means and using them to build a competitive product" ], "agentNotes": [ "For unattended work, call `POST https://app.warp.dev/api/v1/agent/runs` with `Authorization: Bearer $WARP_API_KEY`. The `warp` CLI is interactive only", "Use an agent key, scoped to one cloud agent and given an expiry, for CI rather than a personal key. Keys are created in the Oz web app or the Warp app", "Set `auto_approve_bypasses_command_denylist = false` under `[agents.warp_agent.other]` before starting `warp --auto-approve`", "Read `code` and `retryable` in error bodies. A 429 `resource_unavailable` means capacity is full and the platform retries the task itself", "Pin a version with `WARP_TUI_VERSION` at install, or set `general.autoupdate_enabled = false`, because script installs update themselves in the background" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 4, "avgRating": 3.3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 57.6 } ], "editorialScores": { "ergonomics": 66, "maintenance": 84, "payments": 20, "reliability": 52, "schema": 89, "security": 52, "transparency": 57 }, "provenanceScore": 81, "checked": { "categories": { "ergonomics": "2026-11-04", "maintenance": "2026-11-04", "payments": "2026-11-04", "reliability": "2026-11-04", "schema": "2026-11-04", "security": "2026-11-04", "transparency": "2026-11-04" }, "last": "2026-11-04", "lastMoved": "2026-11-04", "oldest": "2026-11-04", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "curl -fsSL https://app.warp.dev/download/agent-cli | bash # or: brew install --cask warp-agent-cli", "http": "curl -X POST https://app.warp.dev/api/v1/agent/runs \\\n -H \"Authorization: Bearer $WARP_API_KEY\" -H \"Content-Type: application/json\" \\\n -d '{\"prompt\": \"Scan the repo for outdated dependencies and summarize the findings.\", \"config\": {\"environment_id\": \"\u003cENV_ID\u003e\"}}'", "headless": { "command": "oz agent run --prompt \"$TASK\"", "env": { "WARP_API_KEY": "wk-..." } } }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/warp" }, "area": "frameworks", "unitPrices": [ { "item": "Build plan", "unit": "month", "usd": 20, "note": "includes $20 of agent usage at API rates" }, { "item": "Max plan", "unit": "month", "usd": 200, "note": "includes $200 of agent usage" }, { "item": "Business seat", "unit": "seat-month", "usd": 50, "note": "includes $20 of usage a seat, up to 25 seats" } ], "provenance": { "legalEntity": "Denver Technologies, Inc. (d/b/a Warp)", "domain": "warp.dev", "domainRegistered": "2020-08-24", "endpointOnVendorDomain": true, "terms": "https://www.warp.dev/legal/terms-of-service", "privacy": "https://www.warp.dev/legal/privacy-policy", "statusPage": "https://status.warp.dev", "changelog": "https://docs.warp.dev/changelog/", "securityTxt": "none", "checked": "2026-10-18", "notes": [ "The Software and Services Licence Agreement names Denver Technologies, Inc. d/b/a Warp.dev, and the privacy notice names Denver Technologies, Inc., d.b.a. Warp. Neither page shows an update date.", "Google Registry RDAP gives warp.dev a registration date of 2020-08-24.", "The API is served from app.warp.dev, on the vendor's domain.", "www.warp.dev/.well-known/security.txt and docs.warp.dev/.well-known/security.txt answered 404 on 18 October 2026, and app.warp.dev returns its web app for that path. SECURITY.md in the repository names security@warp.dev and private GitHub advisories.", "Subprocessors are listed at https://www.warp.dev/legal/subprocessors, which answered but was not read in full." ], "score": 81 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/warp.json", "live": { "slug": "warp", "vendorStatus": { "page": "https://status.warp.dev", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-11-07T18:22:10.644410957Z" }, "versions": [ { "registry": "github", "name": "warpdotdev/warp", "version": "v0.2026.06.03.09.49.stable_00", "released": "2026-06-03", "seenAt": "2026-11-07T00:16:42.576390527Z" }, { "registry": "npm", "name": "@warp-dot-dev/warp-platform-sdk", "version": "2.0.0", "seenAt": "2026-11-07T00:16:41.603724025Z" }, { "registry": "pypi", "name": "warp-platform-sdk", "version": "1.0.0", "released": "2026-10-06", "seenAt": "2026-11-07T00:16:41.357602339Z" } ], "githubStars": 65899, "npmWeekly": 1489, "pypiWeekly": 15, "securityTxt": { "url": "https://warp.dev/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T15:59:43.422778651Z" }, "llmsTxt": { "url": "https://docs.warp.dev/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:34:20.17683204Z" }, "domain": { "domain": "warp.dev", "registered": "2020-08-24", "source": "https://pubapi.registry.google/rdap/domain/warp.dev", "checkedAt": "2026-11-01T14:16:20.895385448Z" }, "pages": [ { "url": "https://docs.warp.dev/changelog/", "kind": "changelog", "status": 200, "checkedAt": "2026-11-07T14:08:40.51035519Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "4b43ced29e0a" }, { "url": "https://www.warp.dev/legal/privacy-policy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:36:47.53295447Z", "changedAt": "2026-11-05T13:19:56.967722061Z", "fingerprint": "c14dbc0b5941" }, { "url": "https://www.warp.dev/legal/terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:36:53.171004641Z", "changedAt": "2026-11-05T13:19:59.777340239Z", "fingerprint": "4cb9c9ce863b" } ], "github": { "repo": "warpdotdev/warp", "checkedAt": "2026-11-02T09:37:44.512043486Z", "stars": 65830, "archived": false, "issuesEnabled": true, "pushedAt": "2026-10-31T00:01:55Z", "openIssues": 3997, "openPRs": 1521, "issuesOpened90d": 454, "issuesClosed90d": 262, "prsMerged90d": 655, "ci": { "branch": "master", "runs": 50, "success": 46, "failure": 1, "other": 3, "latest": "success", "latestAt": "2026-10-30T22:29:59Z" }, "advisories": [ { "ghsa": "GHSA-3839-h8jj-ph82", "cve": "CVE-2026-48721", "severity": "high", "published": "2026-06-09T19:48:20Z" }, { "ghsa": "GHSA-9w2v-jhww-vm85", "cve": "CVE-2026-54686", "severity": "medium", "published": "2026-06-09T19:47:36Z" }, { "ghsa": "GHSA-xmw3-wj6r-48m4", "cve": "CVE-2026-54699", "severity": "high", "published": "2026-06-09T19:47:01Z" }, { "ghsa": "GHSA-7xgc-mhc8-g7wc", "cve": "CVE-2026-48731", "severity": "high", "published": "2026-06-09T19:45:56Z" }, { "ghsa": "GHSA-wgqj-4c26-7c4g", "cve": "CVE-2026-48725", "severity": "high", "published": "2026-06-09T19:45:00Z" }, { "ghsa": "GHSA-qqpc-wvvw-4269", "cve": "CVE-2026-48732", "severity": "high", "published": "2026-06-09T19:44:20Z" }, { "ghsa": "GHSA-5h96-jrrq-6hxq", "cve": "CVE-2026-48720", "severity": "high", "published": "2026-06-09T19:43:29Z" }, { "ghsa": "GHSA-8r78-7jwh-m6hm", "cve": "CVE-2026-48703", "severity": "high", "published": "2026-06-09T19:41:39Z" }, { "ghsa": "GHSA-hgvx-4xvm-39pw", "cve": "CVE-2026-48719", "severity": "high", "published": "2026-06-09T19:40:22Z" }, { "ghsa": "GHSA-589x-4mxh-jcrf", "cve": "CVE-2026-48704", "severity": "high", "published": "2026-06-09T19:34:43Z" } ], "replies": { "sampled": 25, "unanswered": 24, "medianDays": 0 } }, "updatedAt": "2026-11-07T18:22:10.644410957Z" } }, "edges": [ { "by": 40, "category": "payments", "leads": "letta", "name": "Payments \u0026 pricing", "reasons": { "a": "No x402, MPP or L402 (0 of 40). Per-unit API prices are public, $0.10 per active agent a month and $0.00015 a second of tool execution, plus plan prices (20). A $0 plan with bring-your-own keys; no card is mentioned (20). The CLI runs locally without signing in (20). Total 60.", "b": "Harness reading of the published rubric, scored on the Warp plan the agent needs. No payment protocol (0). Plan prices are public, and Warp-provided inference is billed at public API rates on paid plans, but the agent-hour platform rate and compute rate for cloud runs were not on the pricing page (10). Free is $0 and includes Warp Agent CLI access, but no bundled Warp inference, so the agent runs only with purchased usage or your own provider key. Whether sign-up asks for a card was not tested (10). A person signs in through a browser or device code, and API keys are created by hand in the Oz web app or the Warp app (0). 0 + 10 + 10 + 0 = 20. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November." }, "scores": { "a": 60, "b": 20 } }, { "by": 19, "category": "schema", "leads": "warp", "name": "Schema \u0026 documentation", "reasons": { "a": "Harness reading. docs.letta.com serves llms.txt and a Markdown version of every page, with an `applies_to` block saying which backend and interface each page covers (10). TypeScript types for the Agent SDK and a documented App Server WebSocket protocol, but no JSON Schema or OpenAPI for the harness (15 of 25). Pages say when to use local or cloud backends, subagents and channels (14 of 20). Permission modes and options are typed in the SDK (12 of 15). Example applications and a remote client reference (11 of 15). Releases most days but no changelog file (8 of 15). Total 70.", "b": "API reading for the Warp Platform API, with the CLI docs read as a framework. docs.warp.dev/openapi.json is OpenAPI 3.0.0 with 293 component schemas and bearer authentication (25). llms.txt with per-section Markdown bundles, including one for the Warp Agent CLI and one for the Automation Platform (10). The run request schema says when each field applies (prompt unless a skill is given, `on_behalf_of` only for agent keys on team runs), and the CLI permissions page states each default and when auto-approve bypasses the denylist (15). Run modes, states and permission values are enumerated, and request bodies are typed objects (13). Curl and SDK examples throughout, and an error catalogue of RFC 7807 bodies with a machine-readable code, `retryable` flag and trace ID per error (14). The API sits under /api/v1 with info version 1.0.0, and the weekly changelog has an Oz updates section, but there is no API-only changelog (12). 25 + 10 + 15 + 13 + 14 + 12 = 89. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November." }, "scores": { "a": 70, "b": 89 } }, { "by": 17, "category": "security", "leads": "warp", "name": "Security \u0026 auth", "reasons": { "a": "Harness reading of the framework checklist, as for the other harnesses. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for injection posture, 15 for audit and 20 for the security programme. Letta Cloud is the default backend, so agent state and conversations go to Letta's servers, and telemetry is on by default (10 of 30). The default permission mode is `unrestricted`; `standard`, `acceptEdits` and `strict` are opt-in, and cloud sandboxes exist for remote work (4 of 20). No prompt-injection guidance found for fetched pages or channel messages (5 of 15). Conversation search and git history of memory give an operator a record of what the agent saw and changed (10 of 15). SECURITY.md routes reports to support@letta.com and scopes out the retired server; no security.txt, bounty or certification found (6 of 20). Total 35.", "b": "Framework reading (telemetry defaults, approvals, guardrails, sandboxing), five lines. The FAQ says the built-in harness runs server-side, so prompts, file contents and command output pass through Warp. The privacy page says AI interactions and console inputs may be collected unless Help improve Warp is off, and the security overview says data collection is on by default for Free and paid teams and off on Business and Enterprise. The opt-out is documented in the desktop app's settings, not for the CLI. Personal and agent keys can expire after 1, 30 or 90 days, and provider keys stay in the device's secure storage (14). Per-action permissions with `always_ask`, `agent_decides` and `always_allow`, edits always shown as a diff under `agent_decides`, a default denylist and child agents asking first. Auto-approve bypasses the user's denylist by default, and no local OS sandbox is documented. Cloud runs use a Docker sandbox as a non-root user with passwordless sudo (11). No prompt-injection guidance was found in the CLI, platform or factory pages read, and secret redaction is off by default (4). Cloud runs record transcripts, tool calls and logs, the API returns timelines and conversations, the app has a Network Log, and the Enterprise Analytics API can filter tool calls for audit (11). SECURITY.md names security@warp.dev and private GitHub advisories, SOC 2 Type II is stated with a trust centre and a subprocessor list. No security.txt and no bug bounty were found, and the GitHub advisory list was not read (12). 14 + 11 + 4 + 11 + 12 = 52. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November." }, "scores": { "a": 35, "b": 52 } }, { "by": 14, "category": "transparency", "leads": "warp", "name": "Transparency \u0026 trust", "reasons": { "a": "Apache-2.0 (30). The privacy policy has no date, no legal entity and no retention periods, and says hosted message data may train future models (8 of 30). The README and docs mark AgentFile, the Electron app and the V1 server as deprecated or retired, without dated notice periods (12 of 20). Telemetry is described in the privacy policy only as basic and opt-out when supported; the LETTA_CODE_TELEM=0 switch appears only in the source (5 of 20). Total 55.", "b": "The client, including the `warp` and `oz` binaries, is AGPL-3.0, an OSI licence, with the UI crates under MIT. The built-in agent harness, the server and Oz orchestration are proprietary, so the part that runs the agent loop is closed. Judgement call (20). The privacy page says Business and Enterprise are covered by zero data retention, the security overview says ZDR applies across all plans and elsewhere mentions it for Enterprise teams, and the legal security page says it is available on the Enterprise plan. The privacy notice gives criteria rather than retention periods. A subprocessor list and a DPA are linked (15). The Oz CLI carries a legacy notice with a promise of guidance before any support change, and the changelog dates renames such as warp-tui to warp, but there is no written deprecation policy or notice period (8). An exhaustive telemetry event table, Rudderstack and Sentry named, and an opt-out in the app's privacy settings. The CLI pages don't describe what the CLI sends or how to switch it off (14). 20 + 15 + 8 + 14 = 57. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November." }, "scores": { "a": 55, "b": 69 } }, { "by": 6, "category": "reliability", "leads": "letta", "name": "Reliability", "reasons": { "a": "Local-software lines, read for the harness. `@letta-ai/letta-code` on npm with Node.js 22.19 or newer, and PyPI wheels for glibc Linux, macOS 14 and Windows x64 with Python 3.9 or newer stated (20). ci.yml, nightly update smoke tests and Telegram live smoke tests exist, but GitHub's API answered with a rate limit, so run results were unread (15 of 25, unchecked). 332 open issues and pull requests, mostly pull requests; recent bug reports such as recall reading the wrong conversation have no reply yet (15 of 25). 398 tags at 0.34.x with release notes on GitHub, no changelog file, and breaking removals such as AgentFile announced in the README (8 of 15). Pre-1.0 (0). Total 58.", "b": "Local-package reading, as for the other harnesses, although the FAQ says the agent harness runs on Warp's servers. An install script for macOS and Linux and a PowerShell one for Windows, with supported systems stated (macOS, Linux x64 and Arm64, Windows x64 and Arm64), and a `warp-agent-cli` cask in Homebrew core that carries a SHA-256. The script itself checks no checksum (18). The repository's Warp CI workflow runs cargo nextest, doc tests, clippy and release-compilation checks on every pull request to master. The repository has 21 workflow files on 4 November. Whether CI passes on the default branch could not be read (15). Issue and pull request counts from the 18 October check came through shields.io badges, a third-party copy of GitHub data this run bars, and are struck. The clone shows 613 commits to master from 6 August. How many open issues are crashes or regressions, and how fast they get replies, could not be read. The weekly changelog records crash fixes in most releases, such as two crash fixes on 7 October 2026 (10). Weekly dated releases with versions such as v0.2026.10.14.08.27 and no breaking-change heading. The binary rename from warp-tui to warp on 23 July 2026 sat under Improvements (4). Version 0.x with date-based numbers. A stable channel is named and the CLI pages carry no beta label (5). Not scored on this reading. Per the 18 October check, not re-read on 4 November, status.warp.dev has components for the agent harness and cloud execution, and logged scheduled cloud agents unavailable for about 2.5 hours on 16 October and session sharing degraded for about 4.75 hours on 30 September 2026. The docs say Warp has no formal SLA. 18 + 15 + 10 + 4 + 5 = 52. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November." }, "scores": { "a": 58, "b": 52 } } ], "facts": [ { "a": "Agent harness", "b": "Agent harness", "name": "Kind" }, { "a": "Letta", "b": "Warp", "name": "Vendor" }, { "a": "no (local only)", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "stdio", "b": "", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Apache-2.0", "b": "Mixed. The client, including the `warp` and `oz` binaries, is AGPL-3.0 with the `warpui_core` and `warpui` crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-11-06", "b": "2026-10-15", "name": "Last release" }, { "a": "no date given", "b": "2025-10-07", "name": "Terms last updated" }, { "a": "no date given", "b": "2026-08-18", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "3.8k stars, 86k npm/wk, 2.2k PyPI/wk", "b": "none", "name": "Popularity" }, { "a": "none", "b": "3.3/5 (4)", "name": "Agent reviews" } ], "faq": [ { "answer": "Letta scores 59.7 (C) on agent readiness against Warp (Warp Agent CLI and the Oz Agent API)'s 57.6 (C), and leads in 4 of 7 scored categories. Warp (Warp Agent CLI and the Oz Agent API) leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust.", "question": "Which is better for AI agents, Letta or Warp (Warp Agent CLI and the Oz Agent API)?" }, { "answer": "Yes. Letta is open source (Apache-2.0). Warp (Warp Agent CLI and the Oz Agent API) is open source (Mixed. The client, including the `warp` and `oz` binaries, is AGPL-3.0 with the `warpui_core` and `warpui` crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0).", "question": "Are Letta and Warp (Warp Agent CLI and the Oz Agent API) open source?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 58 against 52", "Payments \u0026 pricing, 60 against 20" ], "also": [ "Runs on your own machine", "No incidents deducted, where Warp (Warp Agent CLI and the Oz Agent API) loses 3 points for them" ], "goodFor": "Long-lived coding agents and assistants that keep memory and identity across sessions and machines.", "slug": "letta", "watchFor": "The default permission mode is `unrestricted`, the renamed `bypassPermissions`, so tool calls aren't confirmed unless the user picks another mode" }, { "aheadOn": [ "Schema \u0026 documentation, 89 against 70", "Security \u0026 auth, 52 against 35", "Transparency \u0026 trust, 69 against 55" ], "also": null, "goodFor": "Teams that want one agent across an interactive terminal session and API-started cloud runs, including Claude Code and Codex runs on Warp's infrastructure or their own workers.", "slug": "warp", "watchFor": "The `warp` CLI has no print or headless mode. Scripts go through the legacy Oz CLI or the API, both of which need a Warp account" } ], "history": { "letta": null, "warp": [ { "causes": [ "correction" ], "date": "2026-11-04", "delta": -2, "from": 59.6, "fromGrade": "C", "to": 57.6, "toGrade": "C" }, { "causes": [ "method" ], "date": "2026-10-30", "delta": -0.2, "from": 59.8, "fromGrade": "C", "to": 59.6, "toGrade": "C" } ] }, "job": { "capability": "agent.harness", "name": "Agent harnesses" }, "others": [ { "json": "https://www.anchorterminal.com/compare/agent-zero-vs-letta.json", "title": "Agent Zero vs Letta", "url": "https://www.anchorterminal.com/compare/agent-zero-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/agent-zero-vs-warp.json", "title": "Agent Zero vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/agent-zero-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/aider-vs-letta.json", "title": "Aider vs Letta", "url": 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"https://www.anchorterminal.com/compare/junie-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-letta.json", "title": "Kilo Code CLI vs Letta", "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-warp.json", "title": "Kilo Code CLI vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-letta.json", "title": "Kimi Code CLI vs Letta", "url": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-warp.json", "title": "Kimi Code CLI vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-letta.json", "title": "Kiro CLI vs Letta", "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-warp.json", "title": "Kiro CLI vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-mini-swe-agent.json", "title": "Letta vs mini-swe-agent", "url": "https://www.anchorterminal.com/compare/letta-vs-mini-swe-agent" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-minimax-code.json", "title": "Letta vs MiniMax Code", "url": "https://www.anchorterminal.com/compare/letta-vs-minimax-code" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-mistral-vibe-cli.json", "title": "Letta vs Mistral Vibe CLI", "url": "https://www.anchorterminal.com/compare/letta-vs-mistral-vibe-cli" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-muse-code.json", "title": "Letta vs Muse Code", "url": "https://www.anchorterminal.com/compare/letta-vs-muse-code" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-openai-agents-api.json", "title": "Letta vs OpenAI Agents API", "url": "https://www.anchorterminal.com/compare/letta-vs-openai-agents-api" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-openai-codex.json", "title": "Letta vs OpenAI Codex", "url": "https://www.anchorterminal.com/compare/letta-vs-openai-codex" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-opencode.json", "title": "Letta vs OpenCode", "url": "https://www.anchorterminal.com/compare/letta-vs-opencode" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-openhands.json", "title": "Letta vs OpenHands", "url": "https://www.anchorterminal.com/compare/letta-vs-openhands" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-openmausbot.json", "title": "Letta vs OpenMausBot", "url": "https://www.anchorterminal.com/compare/letta-vs-openmausbot" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-orca.json", "title": "Letta vs Orca", "url": "https://www.anchorterminal.com/compare/letta-vs-orca" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-paseo.json", "title": "Letta vs Paseo", "url": "https://www.anchorterminal.com/compare/letta-vs-paseo" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-prime-agent.json", "title": "Letta vs Prime Agent", "url": "https://www.anchorterminal.com/compare/letta-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-qoder-cli.json", "title": "Letta vs Qoder CLI", "url": "https://www.anchorterminal.com/compare/letta-vs-qoder-cli" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-qwen-code.json", "title": "Letta vs Qwen Code", "url": "https://www.anchorterminal.com/compare/letta-vs-qwen-code" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-reflection-mirror.json", "title": "Letta vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/letta-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-rovo-dev-cli.json", "title": "Letta vs Rovo Dev CLI", "url": "https://www.anchorterminal.com/compare/letta-vs-rovo-dev-cli" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-sculptor.json", "title": "Letta vs Sculptor", "url": "https://www.anchorterminal.com/compare/letta-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-t3-code.json", "title": "Letta vs T3 Code", "url": "https://www.anchorterminal.com/compare/letta-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-traycer.json", "title": "Letta vs Traycer", "url": "https://www.anchorterminal.com/compare/letta-vs-traycer" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-unstoppable.json", "title": "Letta vs Unstoppable", "url": "https://www.anchorterminal.com/compare/letta-vs-unstoppable" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-verdent.json", "title": "Letta vs Verdent", "url": "https://www.anchorterminal.com/compare/letta-vs-verdent" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-vibe-trading.json", "title": "Letta vs Vibe-Trading", "url": "https://www.anchorterminal.com/compare/letta-vs-vibe-trading" }, { "json": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-warp.json", "title": "mini-swe-agent vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/minimax-code-vs-warp.json", "title": "MiniMax Code vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/minimax-code-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-warp.json", "title": "Mistral Vibe CLI vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/muse-code-vs-warp.json", "title": "Muse Code vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/muse-code-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/openai-agents-api-vs-warp.json", "title": "OpenAI Agents API vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/openai-agents-api-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/openai-codex-vs-warp.json", "title": "OpenAI Codex vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/openai-codex-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/opencode-vs-warp.json", "title": "OpenCode vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/opencode-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/openhands-vs-warp.json", "title": "OpenHands vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/openhands-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/orca-vs-warp.json", "title": "Orca vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/orca-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/paseo-vs-warp.json", "title": "Paseo vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/paseo-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/prime-agent-vs-warp.json", "title": "Prime Agent vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/prime-agent-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/qoder-cli-vs-warp.json", "title": "Qoder CLI vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/qoder-cli-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/qwen-code-vs-warp.json", "title": "Qwen Code vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/qwen-code-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/reflection-mirror-vs-warp.json", "title": "Mirror CLI vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/reflection-mirror-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/rovo-dev-cli-vs-warp.json", "title": "Rovo Dev CLI vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/rovo-dev-cli-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/sculptor-vs-warp.json", "title": "Sculptor vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/sculptor-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/t3-code-vs-warp.json", "title": "T3 Code vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/t3-code-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/traycer-vs-warp.json", "title": "Traycer vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/traycer-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/verdent-vs-warp.json", "title": "Verdent vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/verdent-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/vibe-trading-vs-warp.json", "title": "Vibe-Trading vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/vibe-trading-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/clawboo-vs-letta.json", "title": "Clawboo vs Letta", "url": "https://www.anchorterminal.com/compare/clawboo-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/clawboo-vs-warp.json", "title": "Clawboo vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/clawboo-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/cli-manager-vs-letta.json", "title": "CLI Manager vs Letta", "url": "https://www.anchorterminal.com/compare/cli-manager-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/cli-manager-vs-warp.json", "title": "CLI Manager vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/cli-manager-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-letta.json", "title": "Harness vs Letta", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-letta" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-warp.json", "title": "Harness vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-paperclip.json", "title": "Letta vs Paperclip", "url": "https://www.anchorterminal.com/compare/letta-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/letta-vs-parallax-agents.json", "title": "Letta vs Parallax", "url": "https://www.anchorterminal.com/compare/letta-vs-parallax-agents" }, { "json": "https://www.anchorterminal.com/compare/openmausbot-vs-warp.json", "title": "OpenMausBot vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/openmausbot-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-warp.json", "title": "Paperclip vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/paperclip-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/parallax-agents-vs-warp.json", "title": "Parallax vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/parallax-agents-vs-warp" }, { "json": "https://www.anchorterminal.com/compare/unstoppable-vs-warp.json", "title": "Unstoppable vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "https://www.anchorterminal.com/compare/unstoppable-vs-warp" } ], "panel": null, "scores": [ { "by": 6, "edge": "letta", "key": "reliability", "letta": 58, "name": "Reliability", "warp": 52, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 19, "edge": "warp", "key": "schema", "letta": 70, "name": "Schema \u0026 documentation", "warp": 89, "weight": 13 }, { "by": 1, "edge": "letta", "key": "ergonomics", "letta": 67, "name": "Agent ergonomics", "warp": 66, "weight": 13 }, { "by": 17, "edge": "warp", "key": "security", "letta": 35, "name": "Security \u0026 auth", "warp": 52, "weight": 14 }, { "by": 40, "edge": "letta", "key": "payments", "letta": 60, "name": "Payments \u0026 pricing", "warp": 20, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 1, "edge": "letta", "key": "maintenance", "letta": 85, "name": "Maintenance \u0026 community", "warp": 84, "weight": 7 }, { "by": 14, "edge": "warp", "key": "transparency", "letta": 55, "name": "Transparency \u0026 trust", "warp": 69, "weight": 7 } ], "summary": "Letta scores 59.7 (C) on agent readiness against Warp (Warp Agent CLI and the Oz Agent API)'s 57.6 (C), and leads in 4 of 7 scored categories. Warp (Warp Agent CLI and the Oz Agent API) leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust. Both do agent harnesses.", "tasks": null, "tutorials": [], "verdicts": { "letta": "Letta's open-source harness gives agents git-tracked memory blocks, skills, subagents and headless JSON runs, with a $0 plan and public per-agent API prices. It starts in the unrestricted permission mode, defaults to Letta Cloud, sends usage telemetry unless LETTA_CODE_TELEM=0 is set, and the V1 API server the comparisons describe is retired.", "warp": "The Warp Platform API has a public OpenAPI file, RFC 7807 errors with a `retryable` flag and Python and TypeScript SDKs. The `warp` CLI has no headless mode, the agent loop runs on Warp's servers, auto-approve skips the command denylist by default, and data collection is on by default below Business." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/letta-vs-warp", "json": "https://www.anchorterminal.com/compare/letta-vs-warp.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/letta-vs-warp.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/letta-vs-warp.min.md" }, "markdown": "Letta scores 59.7 (C) on agent readiness against Warp (Warp Agent CLI and the Oz Agent API)'s 57.6 (C), and leads in 4 of 7 scored categories. Warp (Warp Agent CLI and the Oz Agent API) leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust. Both do agent harnesses.\n\n- Letta: grade C, 59.7/100, rank #684 of 1486. Markdown https://www.anchorterminal.com/tools/letta.md · JSON https://www.anchorterminal.com/api/v1/tools/letta.json\n- Warp (Warp Agent CLI and the Oz Agent API): grade C, 57.6/100, rank #782 of 1486. Markdown https://www.anchorterminal.com/tools/warp.md · JSON https://www.anchorterminal.com/api/v1/tools/warp.json\n- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md\n- All 1500 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md\n- Best memory layers for AI agents: https://www.anchorterminal.com/best/agent-memory/index.md\n- All 353 memory comparisons: https://www.anchorterminal.com/compare/agent-memory/index.md\n\n## Which one, for what\n\n### Letta (C)\n\nGood for: Long-lived coding agents and assistants that keep memory and identity across sessions and machines.\n\nAhead on:\n- Reliability, 58 against 52\n- Payments \u0026 pricing, 60 against 20\n\nAlso in its favour:\n- Runs on your own machine\n- No incidents deducted, where Warp (Warp Agent CLI and the Oz Agent API) loses 3 points for them\n\nWatch for: The default permission mode is `unrestricted`, the renamed `bypassPermissions`, so tool calls aren't confirmed unless the user picks another mode\n\n### Warp (Warp Agent CLI and the Oz Agent API) (C)\n\nGood for: Teams that want one agent across an interactive terminal session and API-started cloud runs, including Claude Code and Codex runs on Warp's infrastructure or their own workers.\n\nAhead on:\n- Schema \u0026 documentation, 89 against 70\n- Security \u0026 auth, 52 against 35\n- Transparency \u0026 trust, 69 against 55\n\nWatch for: The `warp` CLI has no print or headless mode. Scripts go through the legacy Oz CLI or the API, both of which need a Warp account\n\n\n## Why the edge\n\n### Payments \u0026 pricing: Letta +40\n\n- Letta (60): No x402, MPP or L402 (0 of 40). Per-unit API prices are public, $0.10 per active agent a month and $0.00015 a second of tool execution, plus plan prices (20). A $0 plan with bring-your-own keys; no card is mentioned (20). The CLI runs locally without signing in (20). Total 60.\n- Warp (Warp Agent CLI and the Oz Agent API) (20): Harness reading of the published rubric, scored on the Warp plan the agent needs. No payment protocol (0). Plan prices are public, and Warp-provided inference is billed at public API rates on paid plans, but the agent-hour platform rate and compute rate for cloud runs were not on the pricing page (10). Free is $0 and includes Warp Agent CLI access, but no bundled Warp inference, so the agent runs only with purchased usage or your own provider key. Whether sign-up asks for a card was not tested (10). A person signs in through a browser or device code, and API keys are created by hand in the Oz web app or the Warp app (0). 0 + 10 + 10 + 0 = 20. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November.\n\n### Schema \u0026 documentation: Warp (Warp Agent CLI and the Oz Agent API) +19\n\n- Letta (70): Harness reading. docs.letta.com serves llms.txt and a Markdown version of every page, with an `applies_to` block saying which backend and interface each page covers (10). TypeScript types for the Agent SDK and a documented App Server WebSocket protocol, but no JSON Schema or OpenAPI for the harness (15 of 25). Pages say when to use local or cloud backends, subagents and channels (14 of 20). Permission modes and options are typed in the SDK (12 of 15). Example applications and a remote client reference (11 of 15). Releases most days but no changelog file (8 of 15). Total 70.\n- Warp (Warp Agent CLI and the Oz Agent API) (89): API reading for the Warp Platform API, with the CLI docs read as a framework. docs.warp.dev/openapi.json is OpenAPI 3.0.0 with 293 component schemas and bearer authentication (25). llms.txt with per-section Markdown bundles, including one for the Warp Agent CLI and one for the Automation Platform (10). The run request schema says when each field applies (prompt unless a skill is given, `on_behalf_of` only for agent keys on team runs), and the CLI permissions page states each default and when auto-approve bypasses the denylist (15). Run modes, states and permission values are enumerated, and request bodies are typed objects (13). Curl and SDK examples throughout, and an error catalogue of RFC 7807 bodies with a machine-readable code, `retryable` flag and trace ID per error (14). The API sits under /api/v1 with info version 1.0.0, and the weekly changelog has an Oz updates section, but there is no API-only changelog (12). 25 + 10 + 15 + 13 + 14 + 12 = 89. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November.\n\n### Security \u0026 auth: Warp (Warp Agent CLI and the Oz Agent API) +17\n\n- Letta (35): Harness reading of the framework checklist, as for the other harnesses. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for injection posture, 15 for audit and 20 for the security programme. Letta Cloud is the default backend, so agent state and conversations go to Letta's servers, and telemetry is on by default (10 of 30). The default permission mode is `unrestricted`; `standard`, `acceptEdits` and `strict` are opt-in, and cloud sandboxes exist for remote work (4 of 20). No prompt-injection guidance found for fetched pages or channel messages (5 of 15). Conversation search and git history of memory give an operator a record of what the agent saw and changed (10 of 15). SECURITY.md routes reports to support@letta.com and scopes out the retired server; no security.txt, bounty or certification found (6 of 20). Total 35.\n- Warp (Warp Agent CLI and the Oz Agent API) (52): Framework reading (telemetry defaults, approvals, guardrails, sandboxing), five lines. The FAQ says the built-in harness runs server-side, so prompts, file contents and command output pass through Warp. The privacy page says AI interactions and console inputs may be collected unless Help improve Warp is off, and the security overview says data collection is on by default for Free and paid teams and off on Business and Enterprise. The opt-out is documented in the desktop app's settings, not for the CLI. Personal and agent keys can expire after 1, 30 or 90 days, and provider keys stay in the device's secure storage (14). Per-action permissions with `always_ask`, `agent_decides` and `always_allow`, edits always shown as a diff under `agent_decides`, a default denylist and child agents asking first. Auto-approve bypasses the user's denylist by default, and no local OS sandbox is documented. Cloud runs use a Docker sandbox as a non-root user with passwordless sudo (11). No prompt-injection guidance was found in the CLI, platform or factory pages read, and secret redaction is off by default (4). Cloud runs record transcripts, tool calls and logs, the API returns timelines and conversations, the app has a Network Log, and the Enterprise Analytics API can filter tool calls for audit (11). SECURITY.md names security@warp.dev and private GitHub advisories, SOC 2 Type II is stated with a trust centre and a subprocessor list. No security.txt and no bug bounty were found, and the GitHub advisory list was not read (12). 14 + 11 + 4 + 11 + 12 = 52. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November.\n\n### Transparency \u0026 trust: Warp (Warp Agent CLI and the Oz Agent API) +14\n\n- Letta (55): Apache-2.0 (30). The privacy policy has no date, no legal entity and no retention periods, and says hosted message data may train future models (8 of 30). The README and docs mark AgentFile, the Electron app and the V1 server as deprecated or retired, without dated notice periods (12 of 20). Telemetry is described in the privacy policy only as basic and opt-out when supported; the LETTA_CODE_TELEM=0 switch appears only in the source (5 of 20). Total 55.\n- Warp (Warp Agent CLI and the Oz Agent API) (69): The client, including the `warp` and `oz` binaries, is AGPL-3.0, an OSI licence, with the UI crates under MIT. The built-in agent harness, the server and Oz orchestration are proprietary, so the part that runs the agent loop is closed. Judgement call (20). The privacy page says Business and Enterprise are covered by zero data retention, the security overview says ZDR applies across all plans and elsewhere mentions it for Enterprise teams, and the legal security page says it is available on the Enterprise plan. The privacy notice gives criteria rather than retention periods. A subprocessor list and a DPA are linked (15). The Oz CLI carries a legacy notice with a promise of guidance before any support change, and the changelog dates renames such as warp-tui to warp, but there is no written deprecation policy or notice period (8). An exhaustive telemetry event table, Rudderstack and Sentry named, and an opt-out in the app's privacy settings. The CLI pages don't describe what the CLI sends or how to switch it off (14). 20 + 15 + 8 + 14 = 57. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November.\n\n### Reliability: Letta +6\n\n- Letta (58): Local-software lines, read for the harness. `@letta-ai/letta-code` on npm with Node.js 22.19 or newer, and PyPI wheels for glibc Linux, macOS 14 and Windows x64 with Python 3.9 or newer stated (20). ci.yml, nightly update smoke tests and Telegram live smoke tests exist, but GitHub's API answered with a rate limit, so run results were unread (15 of 25, unchecked). 332 open issues and pull requests, mostly pull requests; recent bug reports such as recall reading the wrong conversation have no reply yet (15 of 25). 398 tags at 0.34.x with release notes on GitHub, no changelog file, and breaking removals such as AgentFile announced in the README (8 of 15). Pre-1.0 (0). Total 58.\n- Warp (Warp Agent CLI and the Oz Agent API) (52): Local-package reading, as for the other harnesses, although the FAQ says the agent harness runs on Warp's servers. An install script for macOS and Linux and a PowerShell one for Windows, with supported systems stated (macOS, Linux x64 and Arm64, Windows x64 and Arm64), and a `warp-agent-cli` cask in Homebrew core that carries a SHA-256. The script itself checks no checksum (18). The repository's Warp CI workflow runs cargo nextest, doc tests, clippy and release-compilation checks on every pull request to master. The repository has 21 workflow files on 4 November. Whether CI passes on the default branch could not be read (15). Issue and pull request counts from the 18 October check came through shields.io badges, a third-party copy of GitHub data this run bars, and are struck. The clone shows 613 commits to master from 6 August. How many open issues are crashes or regressions, and how fast they get replies, could not be read. The weekly changelog records crash fixes in most releases, such as two crash fixes on 7 October 2026 (10). Weekly dated releases with versions such as v0.2026.10.14.08.27 and no breaking-change heading. The binary rename from warp-tui to warp on 23 July 2026 sat under Improvements (4). Version 0.x with date-based numbers. A stable channel is named and the CLI pages carry no beta label (5). Not scored on this reading. Per the 18 October check, not re-read on 4 November, status.warp.dev has components for the agent harness and cloud execution, and logged scheduled cloud agents unavailable for about 2.5 hours on 16 October and session sharing degraded for about 4.75 hours on 30 September 2026. The docs say Warp has no formal SLA. 18 + 15 + 10 + 4 + 5 = 52. Warp's terms bar any robot, scraper or other automated means to access its Services, so this run pauses its hosts and the readings from warp.dev pages are per the 18 October check, not re-read on 4 November.\n\n## Score by category\n\n| Category | Weight | Letta | Warp (Warp Agent CLI and the Oz Agent API) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 58 | 52 | Letta +6 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 70 | 89 | Warp (Warp Agent CLI and the Oz Agent API) +19 |\n| Agent ergonomics | 13% (16.2 this run) | 67 | 66 | Letta +1 |\n| Security \u0026 auth | 14% (17.5 this run) | 35 | 52 | Warp (Warp Agent CLI and the Oz Agent API) +17 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 20 | Letta +40 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 85 | 84 | Letta +1 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 55 | 69 | Warp (Warp Agent CLI and the Oz Agent API) +14 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **59.7 · C** | **57.6 · C** | |\n\n## Facts side by side\n\n| Fact | Letta | Warp (Warp Agent CLI and the Oz Agent API) |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | Letta | Warp |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports | stdio | |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | Apache-2.0 | Mixed. The client, including the `warp` and `oz` binaries, is AGPL-3.0 with the `warpui_core` and `warpui` crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | yes | yes |\n| Last release | 2026-11-06 | 2026-10-15 |\n| Terms last updated | no date given | 2025-10-07 |\n| Privacy policy last updated | no date given | 2026-08-18 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | yes |\n| Terms restrict benchmarking | not found in the text | yes |\n| Terms or service can change without notice | not found in the text | not found in the text |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 3.8k stars, 86k npm/wk, 2.2k PyPI/wk | none |\n| Agent reviews | none | 3.3/5 (4) |\n\n## How the scores have moved\n\n### Letta\n\nNo score change since it was listed.\n\n### Warp (Warp Agent CLI and the Oz Agent API)\n\n- -2.0 on 4 November 2026: correction\n- -0.2 on 30 October 2026: checklist\n\n## Verdicts\n\n**Letta.** Letta's open-source harness gives agents git-tracked memory blocks, skills, subagents and headless JSON runs, with a $0 plan and public per-agent API prices. It starts in the unrestricted permission mode, defaults to Letta Cloud, sends usage telemetry unless LETTA_CODE_TELEM=0 is set, and the V1 API server the comparisons describe is retired.\n\n**Warp (Warp Agent CLI and the Oz Agent API).** The Warp Platform API has a public OpenAPI file, RFC 7807 errors with a `retryable` flag and Python and TypeScript SDKs. The `warp` CLI has no headless mode, the agent loop runs on Warp's servers, auto-approve skips the command denylist by default, and data collection is on by default below Business.\n\n## Before you call either\n\n### Letta\n\n1. Start headless runs with an explicit permission mode such as `standard` or `strict`; the default auto-approves tools\n2. Pass `--backend local` for work that must stay on the machine, since Letta Cloud is the default\n3. Set LETTA_CODE_TELEM=0 in unattended runs if usage events must not be sent\n4. Use `letta -p --output-format json` for scripted runs and parse the JSON, not the terminal output\n5. Don't plan on the retired V1 REST server or `.af` AgentFile import; both are gone\n\n### Warp (Warp Agent CLI and the Oz Agent API)\n\n1. For unattended work, call `POST https://app.warp.dev/api/v1/agent/runs` with `Authorization: Bearer $WARP_API_KEY`. The `warp` CLI is interactive only\n2. Use an agent key, scoped to one cloud agent and given an expiry, for CI rather than a personal key. Keys are created in the Oz web app or the Warp app\n3. Set `auto_approve_bypasses_command_denylist = false` under `[agents.warp_agent.other]` before starting `warp --auto-approve`\n4. Read `code` and `retryable` in error bodies. A 429 `resource_unavailable` means capacity is full and the platform retries the task itself\n5. Pin a version with `WARP_TUI_VERSION` at install, or set `general.autoupdate_enabled = false`, because script installs update themselves in the background\n\n## Questions\n\n### Which is better for AI agents, Letta or Warp (Warp Agent CLI and the Oz Agent API)?\n\nLetta scores 59.7 (C) on agent readiness against Warp (Warp Agent CLI and the Oz Agent API)'s 57.6 (C), and leads in 4 of 7 scored categories. Warp (Warp Agent CLI and the Oz Agent API) leads on schema \u0026 documentation, security \u0026 auth and transparency \u0026 trust.\n\n### Are Letta and Warp (Warp Agent CLI and the Oz Agent API) open source?\n\nYes. Letta is open source (Apache-2.0). Warp (Warp Agent CLI and the Oz Agent API) is open source (Mixed. The client, including the `warp` and `oz` binaries, is AGPL-3.0 with the `warpui_core` and `warpui` crates under MIT. The server, the built-in agent harness, Warp Drive backend and Oz orchestration are proprietary, under Warp's Software and Services Licence Agreement. The SDKs are Apache-2.0).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/letta-vs-warp.json, and with the fewest tokens: https://www.anchorterminal.com/compare/letta-vs-warp.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"letta\", \"b\": \"warp\"}`. From a terminal: `anchor compare letta warp`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/letta.json and https://www.anchorterminal.com/api/v1/tools/warp.json\n\n## Other comparisons with Letta or Warp (Warp Agent CLI and the Oz Agent API)\n\n- [Agent Zero vs Letta](https://www.anchorterminal.com/compare/agent-zero-vs-letta.md)\n- [Agent Zero vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/agent-zero-vs-warp.md)\n- [Aider vs Letta](https://www.anchorterminal.com/compare/aider-vs-letta.md)\n- [Aider vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/aider-vs-warp.md)\n- [Amp vs Letta](https://www.anchorterminal.com/compare/amp-vs-letta.md)\n- [Amp vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/amp-vs-warp.md)\n- [Antigravity CLI vs Letta](https://www.anchorterminal.com/compare/antigravity-cli-vs-letta.md)\n- [Antigravity CLI vs Warp (Warp Agent CLI and 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"credit": "CC BY 4.0, credit Anchor Terminal and link the page or API address you took it from (https://www.anchorterminal.com/terms/#data)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-11-07", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.7", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run", "terms": "https://www.anchorterminal.com/terms/#data" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Letta vs Warp (Warp Agent CLI and the Oz Agent API)", "url": "" } ], "description": "Letta scores 59.7 (C) to Warp's 57.6 (C) for agent harnesses. 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