{ "data": { "a": { "slug": "harness-autonomous", "name": "Harness", "vendor": "Autonomous, Inc.", "vendorUrl": "https://www.autonomous.ai/harness", "kind": "harness", "category": "agent-harnesses", "summary": "Harness, by Autonomous, is an open-source app that runs Claude Code, Codex and twelve other coding agents in tmux sessions across a person's computers. Agents can start, wait for and read other agents through its CLI or MCP tools.", "url": "https://www.anchorterminal.com/tools/harness-autonomous", "markdownUrl": "https://www.anchorterminal.com/tools/harness-autonomous.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/harness-autonomous.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/harness-autonomous.json", "dns": "harness-autonomous.grade.anchorterminal.com", "repo": "https://github.com/autonomous-ai/openharness", "license": "MIT", "transports": [ "stdio" ], "packages": [], "auth": "oauth", "authNotes": "No account for harnesses on one computer. Agents starting harnesses, remote machines and the phone need the person's Harness account, signed in with Google or Apple in a browser (PKCE) or by QR from the phone. Agents use the person's own Claude Code or Codex credentials.", "pricing": "free", "pricingNotes": "The desktop app, CLI and phone apps are free and MIT licensed. Agent subscriptions and model usage are the person's own. The Harness Device ($149) and Harness Pro ($299) are optional hardware.", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the README, llms.txt, the agents page or the CLI source (checked 2026-10-17). The software has nothing to buy.", "endpoints": [] }, "toolCount": 11, "popularity": { "githubStars": 1284, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-17" }, "docsUrl": "https://harness.autonomous.ai/agents", "llmsTxt": "https://harness.autonomous.ai/llms.txt", "registryName": "ai.autonomous.harness/harness", "capabilities": [ "agent.multi-agent" ], "tags": [ "open-source", "mit", "local", "free", "no-card", "macos", "linux", "typescript", "mcp", "llms-txt", "desktop-app", "cli", "agent-skill" ], "lastRelease": "2026-11-03", "graded": true, "anchor": { "graded": true, "score": 60.9, "grade": "C", "agentReady": false, "rank": 629, "ranked": true, "rankOf": 1486, "categoryRank": 16, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 77, "maintenance": 75, "payments": 40, "reliability": 40, "schema": 85, "security": 54, "transparency": 64 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "low", "date": "2026-11-04" }, "negative": 0, "verdict": "An agent can start Claude Code or Codex sessions the person can watch, on any of their machines, through documented CLI commands and 11 MCP tools. Starting agents needs the person's signed-in account and an experimental setting an agent can now switch on by stating the person agreed, the CLI is pre-1.0, and usage counts are shared by default.", "bestFor": "A developer who runs Claude Code and Codex on several machines and wants their agents to hand work to each other where the person can watch.", "strengths": [ "Eleven MCP tools with typed JSON Schema inputs, readOnlyHint on six reads, and no safe hint on the settings tool so engines ask first", "In the official MCP registry since 19 October 2026 as ai.autonomous.harness/harness, with a checksummed MCPB file", "At most four live harnesses per agent, and an agent may close only the ones it started", "MIT licence for the app, CLI, daemon, relay and device firmware, with 884 tags between 9 September and 4 November 2026", "Remote terminal traffic is end-to-end encrypted, direct over WebRTC where the network allows, and relays forward ciphertext" ], "weaknesses": [ "Starting harnesses needs the person signed in with Google or Apple in a browser", "Since 26 October an agent can turn on Agents can start other agents itself by asserting the person said yes, checked only by the engine's own prompt", "The CLI agents call is version 0.5.33, and the registry entry (0.4.20) lags it", "Product usage counts are shared by default, with an opt-out in Settings or `harness privacy off`", "Installing Harness adds its commands to Claude Code's and Codex's permission rules, and Codex runs them outside its sandbox" ], "agentNotes": [ "Run `harness whoami` first. If it says you may not start harnesses, tell the person and do the work yourself", "Ask the person before installing Harness, and leave `harness login` to them", "Pass `--person-said-yes` or `person_said_yes` only after the person said yes to that setting in this conversation, never on your own judgement", "Treat exit 5 as final and do not retry. Treat exit 3 as needs the person, and never answer a harness's question or permission prompt", "Name every harness, put the whole task in `harness new`, then wait, read with `harness show` and close only the ones you started" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 4, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "low", "grade": "C", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 60.9 } ], "editorialScores": { "ergonomics": 77, "maintenance": 75, "payments": 40, "reliability": 40, "schema": 85, "security": 54, "transparency": 64 }, "provenanceScore": 64, "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://harness.autonomous.ai/cli/install.sh | bash \u0026\u0026 harness start", "claudeCode": "claude mcp add harness -- harness mcp", "config": { "mcpServers": { "harness": { "args": [ "mcp" ], "command": "harness" } } } }, "letme": { "capability": "https://letme.dev/agent.multi-agent", "tool": "https://letme.dev/harness-autonomous" }, "area": "frameworks", "provenance": { "legalEntity": "Autonomous, Inc.", "domain": "autonomous.ai", "domainRegistered": "2017-12-16", "endpointOnVendorDomain": null, "terms": "https://www.autonomous.ai/terms-of-use", "privacy": "https://www.autonomous.ai/privacy", "statusPage": "", "changelog": "https://github.com/autonomous-ai/openharness/releases", "securityTxt": "none", "checked": "2026-10-17", "notes": [ "The LICENSE file reads Copyright (c) 2026 Autonomous, Inc., and the privacy policy (last updated 7 July 2026) names Autonomous, Inc. The terms choose the law of California with binding arbitration.", "The privacy policy and terms cover Autonomous's websites, stores and apps in general. Neither names Harness or its product usage counts, which are described in the repository.", "RDAP at Identity Digital gives a registration date of 2017-12-16 for autonomous.ai.", "security.txt returned 404 on www.autonomous.ai and harness.autonomous.ai on 17 October 2026. The repository's SECURITY.md asks for reports to dee@autonomous.ai, with acknowledgement within three working days.", "CHANGELOG.md covers only the provider protocol (0.3.0, 6 August 2026). The CLI release workflow cuts a GitHub Release per tag, which we could not read because GitHub's web pages and API were not reachable from our network.", "The software runs on the owner's machines. Accounts, the relay and the backend are Autonomous's, and no status page was found." ], "score": 64 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/harness-autonomous.json", "live": { "slug": "harness-autonomous", "versions": [ { "registry": "github", "name": "autonomous-ai/openharness", "version": "v0.5.63_cli", "released": "2026-11-06", "seenAt": "2026-11-06T23:32:08.369725201Z" }, { "registry": "mcp-registry", "name": "ai.autonomous.harness/harness", "version": "0.4.20", "seenAt": "2026-11-07T18:16:28.95801333Z" } ], "githubStars": 1435, "securityTxt": { "url": "https://autonomous.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-11-07T15:59:59.998480826Z" }, "llmsTxt": { "url": "https://harness.autonomous.ai/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-11-07T15:32:40.687248518Z" }, "domain": { "domain": "autonomous.ai", "registered": "2017-12-16", "source": "https://rdap.identitydigital.services/rdap/domain/autonomous.ai", "checkedAt": "2026-11-01T14:08:58.413748749Z" }, "pages": [ { "url": "https://www.autonomous.ai/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-11-07T14:25:08.527177066Z", "changedAt": "2026-10-29T05:20:02.61412464Z", "fingerprint": "7988b9d70c73" }, { "url": "https://www.autonomous.ai/terms-of-use", "kind": "terms", "status": 200, "checkedAt": "2026-11-07T14:25:11.312495479Z", "changedAt": "2026-10-29T05:20:05.498709134Z", "fingerprint": "58f5a5e78e7e" } ], "github": { "repo": "autonomous-ai/openharness", "checkedAt": "2026-11-02T08:32:52.269298204Z", "stars": 1408, "archived": false, "issuesEnabled": true, "pushedAt": "2026-11-02T08:30:06Z", "openIssues": 25, "openPRs": 66, "issuesOpened90d": 123, "issuesClosed90d": 98, "prsMerged90d": 2051, "ci": { "branch": "main", "runs": 50, "success": 40, "failure": 0, "other": 10, "latest": "success", "latestAt": "2026-10-30T08:10:50Z" }, "replies": { "sampled": 25, "unanswered": 12, "medianDays": 0.8 } }, "updatedAt": "2026-11-07T18:16:28.95801333Z" } }, "answer": "Harness scores 60.9 (C) on agent readiness against T3 Code's 51.9 (D), and leads in 4 of 7 scored categories. T3 Code leads on payments \u0026 pricing.", "b": { "slug": "t3-code", "name": "T3 Code", "vendor": "T3 Tools Inc.", "vendorUrl": "https://t3.codes", "kind": "harness", "category": "agent-harnesses", "summary": "T3 Code is an open-source control surface for the coding agents on your machine, Claude Code, Codex, Cursor, Grok Build, OpenCode, Antigravity and fx, from desktop, web and iOS and Android apps.", "url": "https://www.anchorterminal.com/tools/t3-code", "markdownUrl": "https://www.anchorterminal.com/tools/t3-code.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/t3-code.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/t3-code.json", "dns": "t3-code.grade.anchorterminal.com", "repo": "https://github.com/pingdotgg/t3code", "license": "MIT", "transports": [], "packages": [], "auth": "none", "pricing": "free", "pricingNotes": "Free and open source. You pay for the coding agents it runs, through your own subscriptions or API keys (checked 2026-11-07).", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "No payment protocol in the repository or README (checked 2026-11-07).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-11-07" }, "docsUrl": "https://github.com/pingdotgg/t3code/tree/main/docs", "capabilities": [ "agent.harness", "agent.multi-agent" ], "tags": [ "open-source", "mit", "desktop-app", "mobile", "telemetry", "new" ], "lastRelease": "2026-11-06", "graded": true, "anchor": { "graded": true, "score": 51.9, "grade": "D", "agentReady": false, "rank": 1002, "ranked": true, "rankOf": 1486, "categoryRank": 40, "methodology": "0.7", "run": "2026-10-01", "scores": { "ergonomics": 60, "maintenance": 75, "payments": 60, "reliability": 43, "schema": 55, "security": 35, "transparency": 51 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "low", "date": "2026-11-07" }, "negative": 0, "verdict": "A fast-moving open-source way to run and steer several coding agents from desktop, browser or phone, using the subscriptions you already have. It's pre-1.0, and it sends usage data by default, including hashed identifiers for your OpenAI and Claude accounts, with the opt-out documented outside the README.", "bestFor": "Developers who want one app, including on their phone, to drive several coding agents they already pay for.", "strengths": [ "Controls Claude Code, Codex, Cursor, Grok Build, OpenCode, Antigravity and fx with your existing subscriptions", "iOS and Android apps to steer agents running on your machine", "Managed policies for teams, including turning telemetry off", "MIT, with active CI and daily nightlies" ], "weaknesses": [ "Usage data on by default, with hashed OpenAI and Claude account identifiers, and relay traces to Axiom", "The telemetry opt-out is in the docs, not the README", "Pre-1.0, at 0.1.7 stable", "Installs with curl piped to sh" ], "agentNotes": [ "Set T3CODE_TELEMETRY_ENABLED=false before starting the server if you don't want usage events sent", "Install and log in to at least one provider CLI first, such as codex login or claude auth login", "Use a managed policy to fix settings across a team" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "low", "grade": "D", "methodology": "0.7", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 51.9 } ], "editorialScores": { "ergonomics": 60, "maintenance": 75, "payments": 60, "reliability": 43, "schema": 55, "security": 35, "transparency": 62 }, "provenanceScore": 40, "checked": { "categories": { "ergonomics": "2026-11-07", "maintenance": "2026-11-07", "payments": "2026-11-07", "reliability": "2026-11-07", "schema": "2026-11-07", "security": "2026-11-07", "transparency": "2026-11-07" }, "last": "2026-11-07", "oldest": "2026-11-07", "stale": false, "staleAfterDays": 90 } }, "connect": { "install": "curl -fsSL https://t3.codes/install.sh | sh" }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/t3-code" }, "area": "frameworks", "provenance": { "legalEntity": "T3 Tools Inc.", "domain": "t3.codes", "domainRegistered": "", "domainNote": "Not looked up: RDAP isn't requested under the 1 November 2026 rules.", "endpointOnVendorDomain": null, "terms": "", "privacy": "", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-11-07", "notes": [ "The licence names T3 Tools Inc.. The repository is github.com/pingdotgg/t3code." ], "score": 40 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/t3-code.json", "live": { "slug": "t3-code", "securityTxt": { "url": "https://t3.codes/.well-known/security.txt", "state": "valid", "expires": "2027-11-07T09:42:17.281Z", "checkedAt": "2026-11-07T16:01:55.404622007Z" }, "updatedAt": "2026-11-07T16:01:55.404622007Z" } }, "edges": [ { "by": 30, "category": "schema", "leads": "harness-autonomous", "name": "Schema \u0026 documentation", "reasons": { "a": "Read as an MCP server and CLI. Eleven tools in source at v0.5.33, each with a typed JSON Schema input built by one helper, required fields marked, plus `--json` on every command. No OpenAPI, which a stdio server does not need (23). llms.txt and a Markdown-like agents page written for agents, per the 17 October check, not re-read on 4 November, since Autonomous's terms forbid access to its sites by automated means, including scripts or web crawlers, and its hosts are paused pending the founder (10). The tool descriptions and server instructions say when to call whoami first, to prefer a new project over an existing folder, to read before telling a harness more, and that turning a setting on is the person's yes to give (20). An enum on `agent` and on the setting `name`, `minItems` on wait names, minimum and maximum on `timeout_seconds`, a minimum on `chars` and `limit`. `machine`, `folder`, `project` and `model` are free strings (12). Worked examples, the exit code table and the `Next:` line per the 17 October reading of the agents page and llms.txt, with exit codes still in the source (13). Per-component semver tags, but the only CHANGELOG.md covers the provider protocol (0.3.0, 6 August 2026), and GitHub's release pages could not be read (7). 23 + 10 + 20 + 12 + 13 + 7 = 85.", "b": "Harness reading. User docs in the repository (managed policy, handoffs, providers, telemetry), AGENTS.md for contributors, a server other clients connect to (55)." }, "scores": { "a": 85, "b": 55 } }, { "by": 20, "category": "payments", "leads": "t3-code", "name": "Payments \u0026 pricing", "reasons": { "a": "No payment protocol (0). Read with the self-hosted rule. The software is free and the optional hardware prices are public, per the 17 October check, not re-read on 4 November, since Autonomous's terms forbid access to its sites by automated means, including scripts or web crawlers, and its hosts are paused pending the founder (20). Free with no card (20). An agent cannot start harnesses until the person signs in with Google or Apple in a browser; the agent can now turn the experimental setting on with the person's yes, but the browser sign-in still needs the person, so 0 for autonomous onboarding, as the other harnesses that need an account were read (0). 0 + 20 + 20 + 0 = 40.", "b": "Free self-hosted software with nothing to buy, so 0 for a protocol and 20 each for public pricing, a free tier and onboarding with no sign-up, 60." }, "scores": { "a": 40, "b": 60 } }, { "by": 19, "category": "security", "leads": "harness-autonomous", "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 prompt-injection posture, 15 for audit and 20 for the security programme. Product usage counts are on by default, disclosed with an opt-out in the repository's measurement document (updated 31 October) and without prompts, code or files. Remote traffic is end-to-end encrypted and relays carry ciphertext. Local use needs no account. The daemon updates itself from a checksummed manifest without asking (18). Agents may start harnesses only with the account's Agents can start other agents setting on, with four live harnesses at most and closes limited to their own. Since v0.4.69_cli (26 October 2026) an agent can turn that setting, and the other agent settings, on itself with `harness settings \u003cname\u003e on --person-said-yes` or the harness_settings tool, after asking the person; the source says the yes is the agent's word and is logged with the agent's name. The tool carries no safe hint, and the command is not in Harness's allow rules, so the engine's own permission prompt still applies. Against that, installing Harness adds its other commands to Claude Code's and Codex's allow rules, Codex runs them outside its sandbox, there is no sandbox of its own, and the device page listed spoken tasks as auto-allowed on 17 October. 13 on 17 October, when an agent could not turn the setting on, so 10 now. The instructions tell an agent never to answer a harness's question or permission prompt. Harness output is another agent's text, and no further guidance on it was found (9). Every harness shows in the person's app with who started it, the device key log keeps an add and remove history, and an agent's settings change is named in the daemon's log. No per-call audit log found (9). SECURITY.md with an email and a three-working-day acknowledgement, and a documented trust model. No security.txt (17 October check), bug bounty or certification found. OSV lists no advisory for @autonomous-ai/harness-mcp (8). 18 + 10 + 9 + 9 + 8 = 54.", "b": "Harness reading. Product usage events go by default to ingest.t3.codes and PostHog, with hashed identifiers for your T3 Connect, OpenAI and Claude accounts, and relay traces to Axiom, which can include machine names and error text. Off with T3CODE_TELEMETRY_ENABLED=false or a managed policy. Disclosed in docs/user/telemetry.md, not the README (10 of 30). Permission modes and managed policies (12 of 20). No prompt-injection guidance (5). No audit log (5). No security policy file found (3). 10 + 12 + 5 + 5 + 3 = 35." }, "scores": { "a": 54, "b": 35 } }, { "by": 17, "category": "ergonomics", "leads": "harness-autonomous", "name": "Agent ergonomics", "reasons": { "a": "Eleven tools at v0.5.33 (seven on 17 October). Added since then are harness_search, harness_machines, harness_tell and harness_settings; harness_send and harness_tell are listed only inside a harness, so an agent outside one sees nine. Descriptions total about 4,000 characters. Judgement call. By the total, 11 tools fall in the 11 to 30 band (15), with 5 back for listing two tools only inside a harness (20). Counting only the nine an outside agent sees gives 25. We took the stricter reading, as the 17 October check counted the total (20). `chars` sizes a read (4,000 characters by default), `limit` sizes a search (10 by default), `all` widens the list, and `any` returns on the first finished harness. No pagination (14). Exit codes, refusals returned as answers rather than errors so a model does not retry them, and a timed-out wait reported as still working, in the source (19). readOnlyHint on whoami, list, search, machines, wait and read, destructiveHint false on start, tell and send, idempotentHint on close, and no hint on settings so an engine that asks before an unmarked tool asks the person (16). Two required fields on start, defaults of Claude Code and a 45-second wait. No SDK, but a CLI, an MCP server and a plugin with a skill (8). 20 + 14 + 19 + 16 + 8 = 77.", "b": "Harness reading. Remote control from phone or browser, portable handoffs between providers and managed policies for teams (60)." }, "scores": { "a": 77, "b": 60 } }, { "by": 13, "category": "transparency", "leads": "harness-autonomous", "name": "Transparency \u0026 trust", "reasons": { "a": "MIT licence for the whole repository under Autonomous, Inc., with third-party Store covers under their own licences (30). The repository documents what usage counts contain, a 10-day pseudonymous activity mark and the encrypted relay in detail. Autonomous's privacy policy of 7 July 2026 is general to its stores and sites and does not mention Harness, per the 17 October reading and the site's policy reading of 30 October (14). The provider protocol promises both revisions side by side for a deprecation window after a breaking change. Nothing similar for the app or CLI (6). Telemetry is disclosed with an opt-out in the app and CLI, but it is on by default and described in the repository rather than in the privacy policy (14). 30 + 14 + 6 + 14 = 64.", "b": "MIT (30). docs/user/telemetry.md lists what is sent and what isn't, but includes hashed third-party account identifiers and the README doesn't mention it (15 of 30). No deprecation policy (5). Disclosed with an opt-out, on by default (12 of 20). 30 + 15 + 5 + 12 = 62." }, "scores": { "a": 64, "b": 51 } } ], "facts": [ { "a": "Agent harness", "b": "Agent harness", "name": "Kind" }, { "a": "Autonomous, Inc.", "b": "T3 Tools Inc.", "name": "Vendor" }, { "a": "no (local only)", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "stdio", "b": "", "name": "Transports" }, { "a": "OAuth", "b": "None", "name": "Auth" }, { "a": "Free", "b": "Free", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT", "b": "MIT", "name": "Licence" }, { "a": "11", "b": "none", "name": "Tools exposed" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "no", "name": "llms.txt" }, { "a": "ai.autonomous.harness/harness", "b": "not listed", "name": "MCP registry" }, { "a": "2026-11-03", "b": "2026-11-06", "name": "Last release" }, { "a": "no date given", "b": "no document linked", "name": "Terms last updated" }, { "a": "2026-07-07", "b": "no document linked", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "not read yet", "name": "Customer content may train models" }, { "a": "yes", "b": "not read yet", "name": "Terms restrict automated access" }, { "a": "not found in the text", "b": "not read yet", "name": "Terms restrict benchmarking" }, { "a": "yes", "b": "not read yet", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "not read yet", "name": "Arbitration or class-action waiver" }, { "a": "1.3k stars", "b": "none", "name": "Popularity" }, { "a": "3/5 (4)", "b": "none", "name": "Agent reviews" } ], "faq": [ { "answer": "Harness scores 60.9 (C) on agent readiness against T3 Code's 51.9 (D), and leads in 4 of 7 scored categories. T3 Code leads on payments \u0026 pricing.", "question": "Which is better for AI agents, Harness or T3 Code?" }, { "answer": "Yes. Harness is open source (MIT). T3 Code is open source (MIT).", "question": "Are Harness and T3 Code open source?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 85 against 55", "Agent ergonomics, 77 against 60", "Security \u0026 auth, 54 against 35", "Transparency \u0026 trust, 64 against 51" ], "also": [ "Runs on your own machine", "Free to start without a card" ], "goodFor": "A developer who runs Claude Code and Codex on several machines and wants their agents to hand work to each other where the person can watch.", "slug": "harness-autonomous", "watchFor": "Starting harnesses needs the person signed in with Google or Apple in a browser" }, { "aheadOn": [ "Payments \u0026 pricing, 60 against 40" ], "also": [ "No key needed to call it" ], "goodFor": "Developers who want one app, including on their phone, to drive several coding agents they already pay for.", "slug": "t3-code", "watchFor": "Usage data on by default, with hashed OpenAI and Claude account identifiers, and relay traces to Axiom" } ], "history": { "harness-autonomous": [ { "causes": [ "product", "correction" ], "date": "2026-11-04", "delta": 0.9, "from": 60, "fromGrade": "C", "to": 60.9, "toGrade": "C" }, { "causes": [ "method" ], "date": "2026-10-30", "delta": -0.3, "from": 60.3, "fromGrade": "C", "to": 60, "toGrade": "C" } ], "t3-code": null }, "job": { "capability": "agent.multi-agent", "name": "Multi-agent orchestration" }, "others": [ { "json": "https://www.anchorterminal.com/compare/agent-zero-vs-t3-code.json", "title": "Agent Zero vs T3 Code", "url": "https://www.anchorterminal.com/compare/agent-zero-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/aider-vs-t3-code.json", "title": "Aider vs T3 Code", "url": "https://www.anchorterminal.com/compare/aider-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/amp-vs-t3-code.json", "title": "Amp vs T3 Code", "url": "https://www.anchorterminal.com/compare/amp-vs-t3-code" }, { "json": 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Code", "url": "https://www.anchorterminal.com/compare/conductor-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/crush-vs-t3-code.json", "title": "Crush vs T3 Code", "url": "https://www.anchorterminal.com/compare/crush-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-t3-code.json", "title": "Cursor CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/cursor-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/deepseek-harness-vs-t3-code.json", "title": "DeepSeek Harness (dsh) vs T3 Code", "url": "https://www.anchorterminal.com/compare/deepseek-harness-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/deepseek-superagent-vs-t3-code.json", "title": "dsh-superagent (DeepSeek) vs T3 Code", "url": "https://www.anchorterminal.com/compare/deepseek-superagent-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/devin-vs-t3-code.json", "title": "Devin vs T3 Code", "url": "https://www.anchorterminal.com/compare/devin-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/droid-cli-vs-t3-code.json", "title": "Droid CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/droid-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-t3-code.json", "title": "Pi vs T3 Code", "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/emdash-vs-t3-code.json", "title": "Emdash vs T3 Code", "url": "https://www.anchorterminal.com/compare/emdash-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-t3-code.json", "title": "Gemini CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-t3-code.json", "title": "GitHub Copilot CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/goose-vs-t3-code.json", "title": "goose vs T3 Code", "url": "https://www.anchorterminal.com/compare/goose-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/harness2-vs-t3-code.json", "title": "Harness² vs T3 Code", "url": "https://www.anchorterminal.com/compare/harness2-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-t3-code.json", "title": "HarnessRouter vs T3 Code", "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/jules-vs-t3-code.json", "title": "Jules vs T3 Code", "url": "https://www.anchorterminal.com/compare/jules-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/junie-vs-t3-code.json", "title": "Junie CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/junie-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-t3-code.json", "title": "Kilo Code CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-t3-code.json", "title": "Kimi Code CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-t3-code.json", "title": "Kiro CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-t3-code" }, { "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/mini-swe-agent-vs-t3-code.json", "title": "mini-swe-agent vs T3 Code", "url": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/minimax-code-vs-t3-code.json", "title": "MiniMax Code vs T3 Code", "url": "https://www.anchorterminal.com/compare/minimax-code-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-t3-code.json", "title": "Mistral Vibe CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/muse-code-vs-t3-code.json", "title": "Muse Code vs T3 Code", "url": "https://www.anchorterminal.com/compare/muse-code-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/openai-agents-api-vs-t3-code.json", "title": "OpenAI Agents API vs T3 Code", "url": "https://www.anchorterminal.com/compare/openai-agents-api-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/openai-codex-vs-t3-code.json", "title": "OpenAI Codex vs T3 Code", "url": "https://www.anchorterminal.com/compare/openai-codex-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/opencode-vs-t3-code.json", "title": "OpenCode vs T3 Code", "url": "https://www.anchorterminal.com/compare/opencode-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/openhands-vs-t3-code.json", "title": "OpenHands vs T3 Code", "url": "https://www.anchorterminal.com/compare/openhands-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/orca-vs-t3-code.json", "title": "Orca vs T3 Code", "url": "https://www.anchorterminal.com/compare/orca-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/paseo-vs-t3-code.json", "title": "Paseo vs T3 Code", "url": "https://www.anchorterminal.com/compare/paseo-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/prime-agent-vs-t3-code.json", "title": "Prime Agent vs T3 Code", "url": "https://www.anchorterminal.com/compare/prime-agent-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/qoder-cli-vs-t3-code.json", "title": "Qoder CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/qoder-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/qwen-code-vs-t3-code.json", "title": "Qwen Code vs T3 Code", "url": "https://www.anchorterminal.com/compare/qwen-code-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/reflection-mirror-vs-t3-code.json", "title": "Mirror CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/reflection-mirror-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/rovo-dev-cli-vs-t3-code.json", "title": "Rovo Dev CLI vs T3 Code", "url": "https://www.anchorterminal.com/compare/rovo-dev-cli-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/sculptor-vs-t3-code.json", "title": "Sculptor vs T3 Code", "url": "https://www.anchorterminal.com/compare/sculptor-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/t3-code-vs-traycer.json", "title": "T3 Code vs Traycer", "url": "https://www.anchorterminal.com/compare/t3-code-vs-traycer" }, { "json": "https://www.anchorterminal.com/compare/t3-code-vs-unstoppable.json", "title": "T3 Code vs Unstoppable", "url": "https://www.anchorterminal.com/compare/t3-code-vs-unstoppable" }, { "json": "https://www.anchorterminal.com/compare/t3-code-vs-verdent.json", "title": "T3 Code vs Verdent", "url": "https://www.anchorterminal.com/compare/t3-code-vs-verdent" }, { "json": "https://www.anchorterminal.com/compare/t3-code-vs-vibe-trading.json", "title": "T3 Code vs Vibe-Trading", "url": "https://www.anchorterminal.com/compare/t3-code-vs-vibe-trading" }, { "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/amp-vs-harness-autonomous.json", "title": "Amp vs Harness", "url": "https://www.anchorterminal.com/compare/amp-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-harness-autonomous.json", "title": "Antigravity CLI vs Harness", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/auggie-vs-harness-autonomous.json", "title": "Auggie CLI vs Harness", "url": "https://www.anchorterminal.com/compare/auggie-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/axlr-vs-harness-autonomous.json", "title": "AXLR vs Harness", "url": "https://www.anchorterminal.com/compare/axlr-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/claude-code-vs-harness-autonomous.json", "title": "Claude Code vs Harness", "url": "https://www.anchorterminal.com/compare/claude-code-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/clawboo-vs-harness-autonomous.json", "title": "Clawboo vs Harness", "url": "https://www.anchorterminal.com/compare/clawboo-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/clawboo-vs-t3-code.json", "title": "Clawboo vs T3 Code", "url": "https://www.anchorterminal.com/compare/clawboo-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/cli-manager-vs-harness-autonomous.json", "title": "CLI Manager vs Harness", "url": "https://www.anchorterminal.com/compare/cli-manager-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/cli-manager-vs-t3-code.json", "title": "CLI Manager vs T3 Code", "url": "https://www.anchorterminal.com/compare/cli-manager-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/cline-vs-harness-autonomous.json", "title": "Cline vs Harness", "url": "https://www.anchorterminal.com/compare/cline-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/conductor-vs-harness-autonomous.json", "title": "Conductor vs Harness", "url": "https://www.anchorterminal.com/compare/conductor-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/crush-vs-harness-autonomous.json", "title": "Crush vs Harness", "url": "https://www.anchorterminal.com/compare/crush-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/deepseek-harness-vs-harness-autonomous.json", "title": "DeepSeek Harness (dsh) vs Harness", "url": "https://www.anchorterminal.com/compare/deepseek-harness-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/deepseek-superagent-vs-harness-autonomous.json", "title": "dsh-superagent (DeepSeek) vs Harness", "url": "https://www.anchorterminal.com/compare/deepseek-superagent-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/devin-vs-harness-autonomous.json", "title": "Devin vs Harness", "url": "https://www.anchorterminal.com/compare/devin-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/droid-cli-vs-harness-autonomous.json", "title": "Droid CLI vs Harness", "url": "https://www.anchorterminal.com/compare/droid-cli-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/emdash-vs-harness-autonomous.json", "title": "Emdash vs Harness", "url": "https://www.anchorterminal.com/compare/emdash-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-harness-autonomous.json", "title": "Gemini CLI vs Harness", "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-harness-autonomous.json", "title": "GitHub Copilot CLI vs Harness", "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/goose-vs-harness-autonomous.json", "title": "goose vs Harness", "url": "https://www.anchorterminal.com/compare/goose-vs-harness-autonomous" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-harnessrouter.json", "title": "Harness vs HarnessRouter", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-harnessrouter" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-jules.json", "title": "Harness vs Jules", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-jules" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-junie.json", "title": "Harness vs Junie CLI", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-junie" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-kilo-code-cli.json", "title": "Harness vs Kilo Code CLI", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-kilo-code-cli" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-kimi-code-cli.json", "title": "Harness vs Kimi Code CLI", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-kimi-code-cli" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-kiro-cli.json", "title": "Harness vs Kiro CLI", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-kiro-cli" }, { "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-minimax-code.json", "title": "Harness vs MiniMax Code", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-minimax-code" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-mistral-vibe-cli.json", "title": "Harness vs Mistral Vibe CLI", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-mistral-vibe-cli" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-muse-code.json", "title": "Harness vs Muse Code", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-muse-code" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-opencode.json", "title": "Harness vs OpenCode", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-opencode" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-openhands.json", "title": "Harness vs OpenHands", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-openhands" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-openmausbot.json", "title": "Harness vs OpenMausBot", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-openmausbot" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-orca.json", "title": "Harness vs Orca", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-orca" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-paperclip.json", "title": "Harness vs Paperclip", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-paperclip" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-parallax-agents.json", "title": "Harness vs Parallax", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-parallax-agents" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-paseo.json", "title": "Harness vs Paseo", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-paseo" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-prime-agent.json", "title": "Harness vs Prime Agent", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-qoder-cli.json", "title": "Harness vs Qoder CLI", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-qoder-cli" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-qwen-code.json", "title": "Harness vs Qwen Code", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-qwen-code" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-reflection-mirror.json", "title": "Harness vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-rovo-dev-cli.json", "title": "Harness vs Rovo Dev CLI", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-rovo-dev-cli" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-sculptor.json", "title": "Harness vs Sculptor", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-sculptor" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-traycer.json", "title": "Harness vs Traycer", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-traycer" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-unstoppable.json", "title": "Harness vs Unstoppable", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-unstoppable" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-verdent.json", "title": "Harness vs Verdent", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-verdent" }, { "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-vibe-trading.json", "title": "Harness vs Vibe-Trading", "url": "https://www.anchorterminal.com/compare/harness-autonomous-vs-vibe-trading" }, { "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/openmausbot-vs-t3-code.json", "title": "OpenMausBot vs T3 Code", "url": "https://www.anchorterminal.com/compare/openmausbot-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-t3-code.json", "title": "Paperclip vs T3 Code", "url": "https://www.anchorterminal.com/compare/paperclip-vs-t3-code" }, { "json": "https://www.anchorterminal.com/compare/parallax-agents-vs-t3-code.json", "title": "Parallax vs T3 Code", "url": "https://www.anchorterminal.com/compare/parallax-agents-vs-t3-code" } ], "panel": null, "scores": [ { "by": 3, "edge": "t3-code", "harness-autonomous": 40, "key": "reliability", "name": "Reliability", "t3-code": 43, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 30, "edge": "harness-autonomous", "harness-autonomous": 85, "key": "schema", "name": "Schema \u0026 documentation", "t3-code": 55, "weight": 13 }, { "by": 17, "edge": "harness-autonomous", "harness-autonomous": 77, "key": "ergonomics", "name": "Agent ergonomics", "t3-code": 60, "weight": 13 }, { "by": 19, "edge": "harness-autonomous", "harness-autonomous": 54, "key": "security", "name": "Security \u0026 auth", "t3-code": 35, "weight": 14 }, { "by": 20, "edge": "t3-code", "harness-autonomous": 40, "key": "payments", "name": "Payments \u0026 pricing", "t3-code": 60, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 0, "edge": "", "harness-autonomous": 75, "key": "maintenance", "name": "Maintenance \u0026 community", "t3-code": 75, "weight": 7 }, { "by": 13, "edge": "harness-autonomous", "harness-autonomous": 64, "key": "transparency", "name": "Transparency \u0026 trust", "t3-code": 51, "weight": 7 } ], "summary": "Harness scores 60.9 (C) on agent readiness against T3 Code's 51.9 (D), and leads in 4 of 7 scored categories. T3 Code leads on payments \u0026 pricing. Both do multi-agent orchestration.", "tasks": null, "tutorials": [], "verdicts": { "harness-autonomous": "An agent can start Claude Code or Codex sessions the person can watch, on any of their machines, through documented CLI commands and 11 MCP tools. Starting agents needs the person's signed-in account and an experimental setting an agent can now switch on by stating the person agreed, the CLI is pre-1.0, and usage counts are shared by default.", "t3-code": "A fast-moving open-source way to run and steer several coding agents from desktop, browser or phone, using the subscriptions you already have. It's pre-1.0, and it sends usage data by default, including hashed identifiers for your OpenAI and Claude accounts, with the opt-out documented outside the README." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/harness-autonomous-vs-t3-code", "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-t3-code.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/harness-autonomous-vs-t3-code.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/harness-autonomous-vs-t3-code.min.md" }, "markdown": "Harness scores 60.9 (C) on agent readiness against T3 Code's 51.9 (D), and leads in 4 of 7 scored categories. T3 Code leads on payments \u0026 pricing. Both do multi-agent orchestration.\n\n- Harness: grade C, 60.9/100, rank #629 of 1486. Markdown https://www.anchorterminal.com/tools/harness-autonomous.md · JSON https://www.anchorterminal.com/api/v1/tools/harness-autonomous.json\n- T3 Code: grade D, 51.9/100, rank #1002 of 1486. Markdown https://www.anchorterminal.com/tools/t3-code.md · JSON https://www.anchorterminal.com/api/v1/tools/t3-code.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\n## Which one, for what\n\n### Harness (C)\n\nGood for: A developer who runs Claude Code and Codex on several machines and wants their agents to hand work to each other where the person can watch.\n\nAhead on:\n- Schema \u0026 documentation, 85 against 55\n- Agent ergonomics, 77 against 60\n- Security \u0026 auth, 54 against 35\n- Transparency \u0026 trust, 64 against 51\n\nAlso in its favour:\n- Runs on your own machine\n- Free to start without a card\n\nWatch for: Starting harnesses needs the person signed in with Google or Apple in a browser\n\n### T3 Code (D)\n\nGood for: Developers who want one app, including on their phone, to drive several coding agents they already pay for.\n\nAhead on:\n- Payments \u0026 pricing, 60 against 40\n\nAlso in its favour:\n- No key needed to call it\n\nWatch for: Usage data on by default, with hashed OpenAI and Claude account identifiers, and relay traces to Axiom\n\n\n## Why the edge\n\n### Schema \u0026 documentation: Harness +30\n\n- Harness (85): Read as an MCP server and CLI. Eleven tools in source at v0.5.33, each with a typed JSON Schema input built by one helper, required fields marked, plus `--json` on every command. No OpenAPI, which a stdio server does not need (23). llms.txt and a Markdown-like agents page written for agents, per the 17 October check, not re-read on 4 November, since Autonomous's terms forbid access to its sites by automated means, including scripts or web crawlers, and its hosts are paused pending the founder (10). The tool descriptions and server instructions say when to call whoami first, to prefer a new project over an existing folder, to read before telling a harness more, and that turning a setting on is the person's yes to give (20). An enum on `agent` and on the setting `name`, `minItems` on wait names, minimum and maximum on `timeout_seconds`, a minimum on `chars` and `limit`. `machine`, `folder`, `project` and `model` are free strings (12). Worked examples, the exit code table and the `Next:` line per the 17 October reading of the agents page and llms.txt, with exit codes still in the source (13). Per-component semver tags, but the only CHANGELOG.md covers the provider protocol (0.3.0, 6 August 2026), and GitHub's release pages could not be read (7). 23 + 10 + 20 + 12 + 13 + 7 = 85.\n- T3 Code (55): Harness reading. User docs in the repository (managed policy, handoffs, providers, telemetry), AGENTS.md for contributors, a server other clients connect to (55).\n\n### Payments \u0026 pricing: T3 Code +20\n\n- Harness (40): No payment protocol (0). Read with the self-hosted rule. The software is free and the optional hardware prices are public, per the 17 October check, not re-read on 4 November, since Autonomous's terms forbid access to its sites by automated means, including scripts or web crawlers, and its hosts are paused pending the founder (20). Free with no card (20). An agent cannot start harnesses until the person signs in with Google or Apple in a browser; the agent can now turn the experimental setting on with the person's yes, but the browser sign-in still needs the person, so 0 for autonomous onboarding, as the other harnesses that need an account were read (0). 0 + 20 + 20 + 0 = 40.\n- T3 Code (60): Free self-hosted software with nothing to buy, so 0 for a protocol and 20 each for public pricing, a free tier and onboarding with no sign-up, 60.\n\n### Security \u0026 auth: Harness +19\n\n- Harness (54): 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 prompt-injection posture, 15 for audit and 20 for the security programme. Product usage counts are on by default, disclosed with an opt-out in the repository's measurement document (updated 31 October) and without prompts, code or files. Remote traffic is end-to-end encrypted and relays carry ciphertext. Local use needs no account. The daemon updates itself from a checksummed manifest without asking (18). Agents may start harnesses only with the account's Agents can start other agents setting on, with four live harnesses at most and closes limited to their own. Since v0.4.69_cli (26 October 2026) an agent can turn that setting, and the other agent settings, on itself with `harness settings \u003cname\u003e on --person-said-yes` or the harness_settings tool, after asking the person; the source says the yes is the agent's word and is logged with the agent's name. The tool carries no safe hint, and the command is not in Harness's allow rules, so the engine's own permission prompt still applies. Against that, installing Harness adds its other commands to Claude Code's and Codex's allow rules, Codex runs them outside its sandbox, there is no sandbox of its own, and the device page listed spoken tasks as auto-allowed on 17 October. 13 on 17 October, when an agent could not turn the setting on, so 10 now. The instructions tell an agent never to answer a harness's question or permission prompt. Harness output is another agent's text, and no further guidance on it was found (9). Every harness shows in the person's app with who started it, the device key log keeps an add and remove history, and an agent's settings change is named in the daemon's log. No per-call audit log found (9). SECURITY.md with an email and a three-working-day acknowledgement, and a documented trust model. No security.txt (17 October check), bug bounty or certification found. OSV lists no advisory for @autonomous-ai/harness-mcp (8). 18 + 10 + 9 + 9 + 8 = 54.\n- T3 Code (35): Harness reading. Product usage events go by default to ingest.t3.codes and PostHog, with hashed identifiers for your T3 Connect, OpenAI and Claude accounts, and relay traces to Axiom, which can include machine names and error text. Off with T3CODE_TELEMETRY_ENABLED=false or a managed policy. Disclosed in docs/user/telemetry.md, not the README (10 of 30). Permission modes and managed policies (12 of 20). No prompt-injection guidance (5). No audit log (5). No security policy file found (3). 10 + 12 + 5 + 5 + 3 = 35.\n\n### Agent ergonomics: Harness +17\n\n- Harness (77): Eleven tools at v0.5.33 (seven on 17 October). Added since then are harness_search, harness_machines, harness_tell and harness_settings; harness_send and harness_tell are listed only inside a harness, so an agent outside one sees nine. Descriptions total about 4,000 characters. Judgement call. By the total, 11 tools fall in the 11 to 30 band (15), with 5 back for listing two tools only inside a harness (20). Counting only the nine an outside agent sees gives 25. We took the stricter reading, as the 17 October check counted the total (20). `chars` sizes a read (4,000 characters by default), `limit` sizes a search (10 by default), `all` widens the list, and `any` returns on the first finished harness. No pagination (14). Exit codes, refusals returned as answers rather than errors so a model does not retry them, and a timed-out wait reported as still working, in the source (19). readOnlyHint on whoami, list, search, machines, wait and read, destructiveHint false on start, tell and send, idempotentHint on close, and no hint on settings so an engine that asks before an unmarked tool asks the person (16). Two required fields on start, defaults of Claude Code and a 45-second wait. No SDK, but a CLI, an MCP server and a plugin with a skill (8). 20 + 14 + 19 + 16 + 8 = 77.\n- T3 Code (60): Harness reading. Remote control from phone or browser, portable handoffs between providers and managed policies for teams (60).\n\n### Transparency \u0026 trust: Harness +13\n\n- Harness (64): MIT licence for the whole repository under Autonomous, Inc., with third-party Store covers under their own licences (30). The repository documents what usage counts contain, a 10-day pseudonymous activity mark and the encrypted relay in detail. Autonomous's privacy policy of 7 July 2026 is general to its stores and sites and does not mention Harness, per the 17 October reading and the site's policy reading of 30 October (14). The provider protocol promises both revisions side by side for a deprecation window after a breaking change. Nothing similar for the app or CLI (6). Telemetry is disclosed with an opt-out in the app and CLI, but it is on by default and described in the repository rather than in the privacy policy (14). 30 + 14 + 6 + 14 = 64.\n- T3 Code (51): MIT (30). docs/user/telemetry.md lists what is sent and what isn't, but includes hashed third-party account identifiers and the README doesn't mention it (15 of 30). No deprecation policy (5). Disclosed with an opt-out, on by default (12 of 20). 30 + 15 + 5 + 12 = 62.\n\n## Score by category\n\n| Category | Weight | Harness | T3 Code | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 40 | 43 | T3 Code +3 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 85 | 55 | Harness +30 |\n| Agent ergonomics | 13% (16.2 this run) | 77 | 60 | Harness +17 |\n| Security \u0026 auth | 14% (17.5 this run) | 54 | 35 | Harness +19 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 60 | T3 Code +20 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 75 | 75 | even |\n| Transparency \u0026 trust | 7% (8.8 this run) | 64 | 51 | Harness +13 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **60.9 · C** | **51.9 · D** | |\n\n## Facts side by side\n\n| Fact | Harness | T3 Code |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | Autonomous, Inc. | T3 Tools Inc. |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports | stdio | |\n| Auth | OAuth | None |\n| Pricing | Free | Free |\n| x402 | no | no |\n| Licence | MIT | MIT |\n| Tools exposed | 11 | none |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| MCP registry | `ai.autonomous.harness/harness` | not listed |\n| Last release | 2026-11-03 | 2026-11-06 |\n| Terms last updated | no date given | no document linked |\n| Privacy policy last updated | 2026-07-07 | no document linked |\n| Customer content may train models | not found in the text | not read yet |\n| Terms restrict automated access | yes | not read yet |\n| Terms restrict benchmarking | not found in the text | not read yet |\n| Terms or service can change without notice | yes | not read yet |\n| Arbitration or class-action waiver | yes | not read yet |\n| Popularity | 1.3k stars | none |\n| Agent reviews | 3/5 (4) | none |\n\n## How the scores have moved\n\n### Harness\n\n- +0.9 on 4 November 2026: product, correction\n- -0.3 on 30 October 2026: checklist\n\n### T3 Code\n\nNo score change since it was listed.\n\n## Verdicts\n\n**Harness.** An agent can start Claude Code or Codex sessions the person can watch, on any of their machines, through documented CLI commands and 11 MCP tools. Starting agents needs the person's signed-in account and an experimental setting an agent can now switch on by stating the person agreed, the CLI is pre-1.0, and usage counts are shared by default.\n\n**T3 Code.** A fast-moving open-source way to run and steer several coding agents from desktop, browser or phone, using the subscriptions you already have. It's pre-1.0, and it sends usage data by default, including hashed identifiers for your OpenAI and Claude accounts, with the opt-out documented outside the README.\n\n## Before you call either\n\n### Harness\n\n1. Run `harness whoami` first. If it says you may not start harnesses, tell the person and do the work yourself\n2. Ask the person before installing Harness, and leave `harness login` to them\n3. Pass `--person-said-yes` or `person_said_yes` only after the person said yes to that setting in this conversation, never on your own judgement\n4. Treat exit 5 as final and do not retry. Treat exit 3 as needs the person, and never answer a harness's question or permission prompt\n5. Name every harness, put the whole task in `harness new`, then wait, read with `harness show` and close only the ones you started\n\n### T3 Code\n\n1. Set T3CODE_TELEMETRY_ENABLED=false before starting the server if you don't want usage events sent\n2. Install and log in to at least one provider CLI first, such as codex login or claude auth login\n3. Use a managed policy to fix settings across a team\n\n## Questions\n\n### Which is better for AI agents, Harness or T3 Code?\n\nHarness scores 60.9 (C) on agent readiness against T3 Code's 51.9 (D), and leads in 4 of 7 scored categories. T3 Code leads on payments \u0026 pricing.\n\n### Are Harness and T3 Code open source?\n\nYes. Harness is open source (MIT). T3 Code is open source (MIT).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/harness-autonomous-vs-t3-code.json, and with the fewest tokens: https://www.anchorterminal.com/compare/harness-autonomous-vs-t3-code.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"harness-autonomous\", \"b\": \"t3-code\"}`. From a terminal: `anchor compare harness-autonomous t3-code`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/harness-autonomous.json and https://www.anchorterminal.com/api/v1/tools/t3-code.json\n\n## Other comparisons with Harness or T3 Code\n\n- [Agent Zero vs T3 Code](https://www.anchorterminal.com/compare/agent-zero-vs-t3-code.md)\n- [Aider vs T3 Code](https://www.anchorterminal.com/compare/aider-vs-t3-code.md)\n- [Amp vs T3 Code](https://www.anchorterminal.com/compare/amp-vs-t3-code.md)\n- [Antigravity CLI vs T3 Code](https://www.anchorterminal.com/compare/antigravity-cli-vs-t3-code.md)\n- [Auggie CLI vs T3 Code](https://www.anchorterminal.com/compare/auggie-vs-t3-code.md)\n- [AXLR vs T3 Code](https://www.anchorterminal.com/compare/axlr-vs-t3-code.md)\n- [Claude Code vs T3 Code](https://www.anchorterminal.com/compare/claude-code-vs-t3-code.md)\n- [Cline vs T3 Code](https://www.anchorterminal.com/compare/cline-vs-t3-code.md)\n- [Conductor vs T3 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Qwen Code](https://www.anchorterminal.com/compare/harness-autonomous-vs-qwen-code.md)\n- [Harness vs Mirror CLI](https://www.anchorterminal.com/compare/harness-autonomous-vs-reflection-mirror.md)\n- [Harness vs Rovo Dev CLI](https://www.anchorterminal.com/compare/harness-autonomous-vs-rovo-dev-cli.md)\n- [Harness vs Sculptor](https://www.anchorterminal.com/compare/harness-autonomous-vs-sculptor.md)\n- [Harness vs Traycer](https://www.anchorterminal.com/compare/harness-autonomous-vs-traycer.md)\n- [Harness vs Unstoppable](https://www.anchorterminal.com/compare/harness-autonomous-vs-unstoppable.md)\n- [Harness vs Verdent](https://www.anchorterminal.com/compare/harness-autonomous-vs-verdent.md)\n- [Harness vs Vibe-Trading](https://www.anchorterminal.com/compare/harness-autonomous-vs-vibe-trading.md)\n- [Harness vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/harness-autonomous-vs-warp.md)\n- [OpenMausBot vs T3 Code](https://www.anchorterminal.com/compare/openmausbot-vs-t3-code.md)\n- [Paperclip vs T3 Code](https://www.anchorterminal.com/compare/paperclip-vs-t3-code.md)\n- [Parallax vs T3 Code](https://www.anchorterminal.com/compare/parallax-agents-vs-t3-code.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "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": 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