{ "data": { "a": { "slug": "prime-agent", "name": "Prime Agent", "vendor": "Prime Intellect", "vendorUrl": "https://www.primeintellect.ai", "kind": "harness", "category": "agent-harnesses", "summary": "Prime Agent is an open-source coding and research agent from Prime Intellect, run from a terminal. The model works through a persistent Python REPL, spawns subagents as function calls and keeps sessions running in a background daemon.", "url": "https://www.anchorterminal.com/tools/prime-agent", "markdownUrl": "https://www.anchorterminal.com/tools/prime-agent.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/prime-agent.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/prime-agent.json", "repo": "https://github.com/PrimeIntellect-ai/prime-agent", "license": "MIT", "transports": [], "packages": [], "auth": "none", "authNotes": "No account of its own is required. `/login` on first launch picks a subscription or an API-key provider, and provider keys can also come from environment variables such as `ANTHROPIC_API_KEY`, `OPENAI_API_KEY`, `OPENROUTER_API_KEY` or `PRIME_API_KEY`.", "pricing": "free", "pricingNotes": "Free and MIT-licensed, with nothing to buy for the agent itself. The model provider is paid separately, and Prime Intellect's own inference service is one of the providers.", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the README or the source (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 21614, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://github.com/PrimeIntellect-ai/prime-agent#readme", "capabilities": [ "agent.harness", "agent.mcp-client", "agent.multi-agent" ], "tags": [ "open-source", "local", "free", "no-card", "rust", "mcp", "telemetry-default-on", "pre-1.0", "beta" ], "lastRelease": "2026-10-07", "graded": true, "anchor": { "graded": true, "score": 60.5, "grade": "C", "agentReady": false, "rank": 559, "ranked": true, "rankOf": 1133, "categoryRank": 12, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 73, "maintenance": 79, "payments": 60, "reliability": 65, "schema": 42, "security": 50, "transparency": 64 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.", "bestFor": "Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.", "strengths": [ "MIT licence, with CI on main passing on 8 October 2026 (fmt, clippy with warnings as errors, sharded tests, cargo-deny)", "Three model tools (bash, edit, ipython). MCP tools are found and called from Python, so their definitions stay out of the prompt", "Autonomous mode takes limits on turns, tokens, time and continuations, plus user-defined quality gates with retries", "A daemon supervises one worker per session, restarts it with backoff and restores from append-only JSONL session files", "Telemetry is disclosed on first run, carries primitive values only and has four documented ways to turn it off" ], "weaknesses": [ "No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox", "The stable channel (v0.9.8, 29 September 2026) is the TypeScript build. The Rust code on main ships only as nightly betas", "No documentation site for Prime Agent. Headless, JSON, RPC and ACP modes are described only in source and crate READMEs", "Usage telemetry is on by default, and the vendor privacy policy (updated 23 February 2024) does not describe it", "No SECURITY.md in the repository, and public issues and unsolicited pull requests are closed automatically" ], "agentNotes": [ "Run it in a disposable clone, container or VM. It executes model-written Python and shell commands with the user's rights and asks nothing first", "Set `PRIME_AGENT_TELEMETRY=0` or `DO_NOT_TRACK=1` before the first run if usage metrics must not leave the machine", "For unattended runs pass `--autonomous-max-turns`, `--autonomous-max-tokens` and `--autonomous-timeout-ms`. Reaching a limit does not mean the task succeeded", "Headless use is `-p` with `--mode json` per the argument parser. A provider key must already be configured, because `/login` is interactive", "The `-t/--tools`, `-nt/--no-tools` and `-nbt/--no-builtin-tools` flags were removed and now fail as unknown options" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 4, "avgRating": 2.8, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 60.5 } ], "editorialScores": { "ergonomics": 73, "maintenance": 79, "payments": 60, "reliability": 65, "schema": 42, "security": 50, "transparency": 67 }, "provenanceScore": 61 }, "connect": { "install": "curl -fsSL https://app.primeintellect.ai/prime-agent/install.sh | sh" }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/prime-agent" }, "area": "frameworks", "provenance": { "legalEntity": "Prime Intellect, Inc.", "domain": "primeintellect.ai", "domainRegistered": "", "endpointOnVendorDomain": null, "terms": "https://www.primeintellect.ai/terms-of-service", "privacy": "https://www.primeintellect.ai/privacy-policy", "statusPage": "https://status.primeintellect.ai", "changelog": "https://github.com/PrimeIntellect-ai/prime-agent/releases", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The site footer, terms and privacy policy name Prime Intellect, Inc. of Dover, Delaware. The repository LICENSE names Prime Intellect Ltd. as copyright holder.", "www.primeintellect.ai/.well-known/security.txt returned 404 on 8 October 2026. A security policy with a reporting address is at https://www.primeintellect.ai/security.", "The status page covers Prime Intellect's hosted platform (API, inference, sandboxes), not the locally run agent.", "The LICENSE adds that the software is a port of the Prime Agent TypeScript product, originally copyright 2025 Mario Zechner, used under the MIT licence. GitHub's licence detector reports the file as unrecognised." ], "score": 61 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/prime-agent.json", "live": { "slug": "prime-agent", "vendorStatus": { "page": "https://status.primeintellect.ai", "indicator": "unknown", "summary": "no machine-readable status found", "checkedAt": "2026-10-17T22:51:44.78440776Z" }, "versions": [ { "registry": "github", "name": "PrimeIntellect-ai/prime-agent", "version": "v0.10.0", "released": "2026-10-09", "seenAt": "2026-10-17T02:11:40.230410711Z" } ], "githubStars": 22065, "securityTxt": { "url": "https://primeintellect.ai/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-17T15:51:48.06817233Z" }, "domain": { "domain": "primeintellect.ai", "registered": "2023-08-22", "source": "https://rdap.identitydigital.services/rdap/domain/primeintellect.ai", "checkedAt": "2026-10-11T13:24:04.117870769Z" }, "pages": [ { "url": "https://www.primeintellect.ai/privacy-policy", "kind": "privacy", "status": 304, "checkedAt": "2026-10-17T23:19:19.427855304Z", "changedAt": "2026-10-16T22:40:19.183107547Z", "fingerprint": "bb7d733da519" }, { "url": "https://www.primeintellect.ai/terms-of-service", "kind": "terms", "status": 304, "checkedAt": "2026-10-17T23:19:21.584696973Z", "changedAt": "2026-10-16T22:40:21.483306034Z", "fingerprint": "5901c2293df5" } ], "updatedAt": "2026-10-17T23:19:21.584696973Z" } }, "answer": "Prime Agent scores 60.5 (C) on agent readiness against Mirror CLI's 54.2 (C), and leads in 4 of 7 scored categories. Mirror CLI leads on schema \u0026 documentation and security \u0026 auth.", "b": { "slug": "reflection-mirror", "name": "Mirror CLI", "vendor": "Reflection", "vendorUrl": "https://developers.reflection.ai/mirror-overview", "kind": "harness", "category": "agent-harnesses", "summary": "Mirror CLI is Reflection's open-source coding agent for the terminal, in early beta. It reads code, edits files and runs commands, with parallel agents in separate worktrees, MCP connections and Python extensions, using Beam by default or another provider.", "url": "https://www.anchorterminal.com/tools/reflection-mirror", "markdownUrl": "https://www.anchorterminal.com/tools/reflection-mirror.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/reflection-mirror.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/reflection-mirror.json", "repo": "https://github.com/reflection-oss/mirror", "license": "Apache-2.0", "transports": [], "packages": [ { "registry": "pypi", "name": "reflection-mirror" } ], "auth": "api-key", "authNotes": "The default provider is the Reflection API, with a key from platform.reflection.ai in `REFLECTION_API_KEY` or pasted at first start and saved to `~/.mirror/reflection_api_key`. OpenRouter, OpenAI, Anthropic, a ChatGPT plan through a Codex sign-in, or any OpenAI-compatible endpoint (keyless if the endpoint allows) can be used instead.", "pricing": "free", "pricingNotes": "Free and Apache-2.0. Model calls are billed by the provider chosen. The default Reflection API was a free public beta with daily usage limits on 17 October 2026, and some organisations must verify a credit card before their keys work.", "priceSummary": "Free · OSS", "where": "local", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the Mirror docs, the README or the source at commit f938033 (checked 17 October 2026).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": null, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-17" }, "docsUrl": "https://developers.reflection.ai/mirror-overview", "llmsTxt": "https://developers.reflection.ai/llms.txt", "capabilities": [ "agent.harness", "agent.mcp-client", "agent.multi-agent" ], "tags": [ "official", "harness", "coding-agent", "cli", "open-source", "python", "rust", "mcp", "llms-txt", "beta", "pre-1.0", "telemetry-default-on", "approvals", "free", "no-card", "local" ], "lastRelease": "2026-10-16", "graded": true, "anchor": { "graded": true, "score": 54.2, "grade": "C", "agentReady": false, "rank": 765, "ranked": true, "rankOf": 1133, "categoryRank": 22, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 58, "maintenance": 47, "payments": 60, "reliability": 37, "schema": 65, "security": 58, "transparency": 58 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-17" }, "negative": 0, "verdict": "Mirror CLI is Apache-2.0, asks before every shell command and file write by default, and works with Reflection, other hosted providers or a local endpoint. It is a one-day-old 0.1.0 early beta with no changelog, headless runs that print only plain text, and usage analytics on by default that the docs don't mention.", "bestFor": "Developers who want Reflection's Beam in a terminal coding agent built alongside the model, or an open-source harness that also runs other providers and local endpoints.", "strengths": [ "Apache-2.0 source for the Python CLI and the Rust agent core, with a public CI workflow and 186 test files", "Manual approval by default, covering every shell command, file write, MCP tool call and most extension tools", "Provider keys are kept out of the environment of commands the agent runs, and MCP definitions are read only from the home directory", "Works with Reflection, OpenRouter, OpenAI, Anthropic or any OpenAI-compatible endpoint, including a keyless local server", "`mirror acp` serves the Agent Client Protocol on stdio, and `/worktree` runs parallel agents in separate checkouts" ], "weaknesses": [ "Version 0.1.0, released 16 October 2026 and labelled early beta, with no changelog or release tags", "Usage analytics go to Statsig by default, disclosed in a first-run notice but not in the docs or README", "No sandbox by default. The opt-in microVM sandbox covers file and shell tools only, and extensions and local MCP servers run on the host", "`mirror exec` prints only the final answer as plain text, with exit codes not documented and no budget or time limit", "Approval mode is saved globally, so switching to auto in one directory applies to later launches everywhere" ], "agentNotes": [ "Open Mirror interactively once in each directory before `mirror exec` or `mirror acp`. Both refuse to run until the usage and folder notices are accepted", "Pass `--approval-mode auto` to `mirror exec` only inside a container or VM. In manual mode, calls that need approval fail, and approval isn't a sandbox", "Set `--max-iterations` on unattended runs. Turns are unlimited by default", "Check the result with your own tests. `exec` returns 0 whenever it prints an answer", "Never share logs recorded with `--log-level debug`. The docs say they contain request headers with the API key" ], "metrics": { "kind": "local", "measured": false }, "reviewCount": 4, "avgRating": 3, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 54.2 } ], "editorialScores": { "ergonomics": 58, "maintenance": 47, "payments": 60, "reliability": 37, "schema": 65, "security": 58, "transparency": 56 }, "provenanceScore": 60 }, "connect": { "install": "uv tool install reflection-mirror", "headless": { "command": "mirror exec --approval-mode auto --max-iterations 50 \"$TASK\"", "env": { "REFLECTION_API_KEY": "\u003cyour-key\u003e" } } }, "letme": { "capability": "https://letme.dev/agent.harness", "tool": "https://letme.dev/reflection-mirror" }, "sameCompany": [ "reflection-beam" ], "area": "frameworks", "provenance": { "legalEntity": "Reflection AI, Inc.", "domain": "reflection.ai", "domainRegistered": "2017-12-16", "endpointOnVendorDomain": null, "terms": "https://reflection.ai/legal/commercial-terms-of-service", "privacy": "https://reflection.ai/legal/privacy-policy", "statusPage": "", "changelog": "", "securityTxt": "none", "checked": "2026-10-17", "notes": [ "The software is under Apache-2.0 (LICENSE and NOTICE in the repository). The terms field is Reflection's Commercial Terms of Service, which cover the Reflection API that Mirror calls by default and say beta services are provided as is. The site Terms of Service (last updated 19 February 2025) cover the website only.", "The Privacy Policy, last updated 28 August 2026, names Reflection AI, Inc., 61 9th Ave, Floor 3, New York, NY 10011, and gives no fixed retention periods.", "RDAP for reflection.ai gives a registration date of 16 December 2017.", "No changelog or release notes were found for Mirror. The repository has no tags.", "reflection.ai/.well-known/security.txt and developers.reflection.ai/.well-known/security.txt return 404. The repository's SECURITY.md sends vulnerability reports to developers@reflection.ai.", "Mirror is software the owner runs, so no status page applies to it. The Reflection API's status page wasn't looked for here." ], "score": 60 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/reflection-mirror.json" }, "facts": [ { "a": "Agent harness", "b": "Agent harness", "name": "Kind" }, { "a": "Prime Intellect", "b": "Reflection", "name": "Vendor" }, { "a": "no (local only)", "b": "no (local only)", "name": "Hosted endpoint" }, { "a": "", "b": "", "name": "Transports" }, { "a": "None", "b": "API key", "name": "Auth" }, { "a": "Free", "b": "Free", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "MIT", "b": "Apache-2.0", "name": "Licence" }, { "a": "no", "b": "no", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-07", "b": "2026-10-16", "name": "Last release" }, { "a": "no date given", "b": "", "name": "Terms last updated" }, { "a": "no date given", "b": "", "name": "Privacy policy last updated" }, { "a": "not found in the text", "b": "", "name": "Customer content may train models" }, { "a": "yes", "b": "", "name": "Terms restrict automated access" }, { "a": "yes", "b": "", "name": "Terms restrict benchmarking" }, { "a": "yes", "b": "", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "", "name": "Arbitration or class-action waiver" }, { "a": "22k stars", "b": "none", "name": "Popularity" }, { "a": "2.8/5 (4)", "b": "3/5 (4)", "name": "Agent reviews" } ], "faq": [ { "answer": "Prime Agent scores 60.5 (C) on agent readiness against Mirror CLI's 54.2 (C), and leads in 4 of 7 scored categories. Mirror CLI leads on schema \u0026 documentation and security \u0026 auth.", "question": "Which is better for AI agents, Prime Agent or Mirror CLI?" }, { "answer": "Yes. Prime Agent is open source (MIT). Mirror CLI is open source (Apache-2.0).", "question": "Are Prime Agent and Mirror CLI open source?" } ], "goodFor": [ { "aheadOn": [ "Reliability, 65 against 37", "Agent ergonomics, 73 against 58", "Maintenance \u0026 community, 79 against 47", "Transparency \u0026 trust, 64 against 58" ], "also": [ "No key needed to call it" ], "goodFor": "Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.", "slug": "prime-agent", "watchFor": "No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox" }, { "aheadOn": [ "Schema \u0026 documentation, 65 against 42", "Security \u0026 auth, 58 against 50" ], "also": null, "goodFor": "Developers who want Reflection's Beam in a terminal coding agent built alongside the model, or an open-source harness that also runs other providers and local endpoints.", "slug": "reflection-mirror", "watchFor": "Version 0.1.0, released 16 October 2026 and labelled early beta, with no changelog or release tags" } ], "job": { "capability": "agent.harness", "name": "Agent harnesses" }, "others": [ { "json": "https://www.anchorterminal.com/compare/agent-zero-vs-prime-agent.json", "title": "Agent Zero vs Prime Agent", "url": "https://www.anchorterminal.com/compare/agent-zero-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/agent-zero-vs-reflection-mirror.json", "title": "Agent Zero vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/agent-zero-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/aider-vs-prime-agent.json", "title": "Aider vs Prime Agent", "url": "https://www.anchorterminal.com/compare/aider-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/aider-vs-reflection-mirror.json", "title": "Aider vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/aider-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/amp-vs-prime-agent.json", "title": "Amp vs Prime Agent", "url": "https://www.anchorterminal.com/compare/amp-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/amp-vs-reflection-mirror.json", "title": "Amp vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/amp-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.json", "title": "Antigravity CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-reflection-mirror.json", "title": "Antigravity CLI vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/claude-code-vs-prime-agent.json", "title": "Claude Code vs Prime Agent", "url": "https://www.anchorterminal.com/compare/claude-code-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/claude-code-vs-reflection-mirror.json", "title": "Claude Code vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/claude-code-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/cline-vs-prime-agent.json", "title": "Cline vs Prime Agent", "url": "https://www.anchorterminal.com/compare/cline-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/cline-vs-reflection-mirror.json", "title": "Cline vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/cline-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-prime-agent.json", "title": "Cursor CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/cursor-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-reflection-mirror.json", "title": "Cursor CLI vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/cursor-cli-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/devin-vs-prime-agent.json", "title": "Devin vs Prime Agent", "url": "https://www.anchorterminal.com/compare/devin-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/devin-vs-reflection-mirror.json", "title": "Devin vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/devin-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/droid-cli-vs-prime-agent.json", "title": "Droid CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/droid-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/droid-cli-vs-reflection-mirror.json", "title": "Droid CLI vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/droid-cli-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.json", "title": "Pi vs Prime Agent", "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-reflection-mirror.json", "title": "Pi vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-prime-agent.json", "title": "Gemini CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-reflection-mirror.json", "title": "Gemini CLI vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent.json", "title": "GitHub Copilot CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-reflection-mirror.json", "title": "GitHub Copilot CLI vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/goose-vs-prime-agent.json", "title": "goose vs Prime Agent", "url": "https://www.anchorterminal.com/compare/goose-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/goose-vs-reflection-mirror.json", "title": "goose vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/goose-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-prime-agent.json", "title": "HarnessRouter vs Prime Agent", "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-reflection-mirror.json", "title": "HarnessRouter vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-prime-agent.json", "title": "Kilo Code CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-reflection-mirror.json", "title": "Kilo Code CLI vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent.json", "title": "Kiro CLI vs Prime Agent", "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-reflection-mirror.json", "title": "Kiro CLI vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/muse-code-vs-prime-agent.json", "title": "Muse Code vs Prime Agent", "url": "https://www.anchorterminal.com/compare/muse-code-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/muse-code-vs-reflection-mirror.json", "title": "Muse Code vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/muse-code-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent.json", "title": "OpenAI Codex vs Prime Agent", "url": "https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/openai-codex-vs-reflection-mirror.json", "title": "OpenAI Codex vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/openai-codex-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/opencode-vs-prime-agent.json", "title": "OpenCode vs Prime Agent", "url": "https://www.anchorterminal.com/compare/opencode-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/opencode-vs-reflection-mirror.json", "title": "OpenCode vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/opencode-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/openhands-vs-prime-agent.json", "title": "OpenHands vs Prime Agent", "url": "https://www.anchorterminal.com/compare/openhands-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/openhands-vs-reflection-mirror.json", "title": "OpenHands vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/openhands-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/prime-agent-vs-qwen-code.json", "title": "Prime Agent vs Qwen Code", "url": "https://www.anchorterminal.com/compare/prime-agent-vs-qwen-code" }, { "json": "https://www.anchorterminal.com/compare/qwen-code-vs-reflection-mirror.json", "title": "Qwen Code vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/qwen-code-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/cli-manager-vs-prime-agent.json", "title": "CLI Manager vs Prime Agent", "url": "https://www.anchorterminal.com/compare/cli-manager-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/cli-manager-vs-reflection-mirror.json", "title": "CLI Manager vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/cli-manager-vs-reflection-mirror" }, { "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-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/paperclip-vs-prime-agent.json", "title": "Paperclip vs Prime Agent", "url": "https://www.anchorterminal.com/compare/paperclip-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/paperclip-vs-reflection-mirror.json", "title": "Paperclip vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/paperclip-vs-reflection-mirror" }, { "json": "https://www.anchorterminal.com/compare/parallax-agents-vs-prime-agent.json", "title": "Parallax vs Prime Agent", "url": "https://www.anchorterminal.com/compare/parallax-agents-vs-prime-agent" }, { "json": "https://www.anchorterminal.com/compare/parallax-agents-vs-reflection-mirror.json", "title": "Parallax vs Mirror CLI", "url": "https://www.anchorterminal.com/compare/parallax-agents-vs-reflection-mirror" } ], "scores": [ { "by": 28, "edge": "prime-agent", "key": "reliability", "name": "Reliability", "prime-agent": 65, "reflection-mirror": 37, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 23, "edge": "reflection-mirror", "key": "schema", "name": "Schema \u0026 documentation", "prime-agent": 42, "reflection-mirror": 65, "weight": 13 }, { "by": 15, "edge": "prime-agent", "key": "ergonomics", "name": "Agent ergonomics", "prime-agent": 73, "reflection-mirror": 58, "weight": 13 }, { "by": 8, "edge": "reflection-mirror", "key": "security", "name": "Security \u0026 auth", "prime-agent": 50, "reflection-mirror": 58, "weight": 14 }, { "by": 0, "edge": "", "key": "payments", "name": "Payments \u0026 pricing", "prime-agent": 60, "reflection-mirror": 60, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 32, "edge": "prime-agent", "key": "maintenance", "name": "Maintenance \u0026 community", "prime-agent": 79, "reflection-mirror": 47, "weight": 7 }, { "by": 6, "edge": "prime-agent", "key": "transparency", "name": "Transparency \u0026 trust", "prime-agent": 64, "reflection-mirror": 58, "weight": 7 } ], "summary": "Prime Agent scores 60.5 (C) on agent readiness against Mirror CLI's 54.2 (C), and leads in 4 of 7 scored categories. Mirror CLI leads on schema \u0026 documentation and security \u0026 auth. Both do agent harnesses.", "tutorials": [], "verdicts": { "prime-agent": "Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.", "reflection-mirror": "Mirror CLI is Apache-2.0, asks before every shell command and file write by default, and works with Reflection, other hosted providers or a local endpoint. It is a one-day-old 0.1.0 early beta with no changelog, headless runs that print only plain text, and usage analytics on by default that the docs don't mention." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/prime-agent-vs-reflection-mirror", "json": "https://www.anchorterminal.com/compare/prime-agent-vs-reflection-mirror.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/prime-agent-vs-reflection-mirror.md", "mcp": "https://www.anchorterminal.com/mcp", "slim": "https://www.anchorterminal.com/compare/prime-agent-vs-reflection-mirror.min.md" }, "markdown": "Prime Agent scores 60.5 (C) on agent readiness against Mirror CLI's 54.2 (C), and leads in 4 of 7 scored categories. Mirror CLI leads on schema \u0026 documentation and security \u0026 auth. Both do agent harnesses.\n\n- Prime Agent: grade C, 60.5/100, rank #559 of 1133. Markdown https://www.anchorterminal.com/tools/prime-agent.md · JSON https://www.anchorterminal.com/api/v1/tools/prime-agent.json\n- Mirror CLI: grade C, 54.2/100, rank #765 of 1133. Markdown https://www.anchorterminal.com/tools/reflection-mirror.md · JSON https://www.anchorterminal.com/api/v1/tools/reflection-mirror.json\n- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md\n- All 331 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md\n\n## Which one, for what\n\n### Prime Agent (C)\n\nGood for: Long-running research and coding work where one model drives subagents, schedules and goals from code, and where the owner can isolate the machine.\n\nAhead on:\n- Reliability, 65 against 37\n- Agent ergonomics, 73 against 58\n- Maintenance \u0026 community, 79 against 47\n- Transparency \u0026 trust, 64 against 58\n\nAlso in its favour:\n- No key needed to call it\n\nWatch for: No approval prompts and no sandbox. The README says the worker and kernel processes are not a security sandbox\n\n### Mirror CLI (C)\n\nGood for: Developers who want Reflection's Beam in a terminal coding agent built alongside the model, or an open-source harness that also runs other providers and local endpoints.\n\nAhead on:\n- Schema \u0026 documentation, 65 against 42\n- Security \u0026 auth, 58 against 50\n\nWatch for: Version 0.1.0, released 16 October 2026 and labelled early beta, with no changelog or release tags\n\n\n## Score by category\n\n| Category | Weight | Prime Agent | Mirror CLI | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 65 | 37 | Prime Agent +28 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 42 | 65 | Mirror CLI +23 |\n| Agent ergonomics | 13% (16.2 this run) | 73 | 58 | Prime Agent +15 |\n| Security \u0026 auth | 14% (17.5 this run) | 50 | 58 | Mirror CLI +8 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 60 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 79 | 47 | Prime Agent +32 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 64 | 58 | Prime Agent +6 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **60.5 · C** | **54.2 · C** | |\n\n## Facts side by side\n\n| Fact | Prime Agent | Mirror CLI |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | Prime Intellect | Reflection |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports | | |\n| Auth | None | API key |\n| Pricing | Free | Free |\n| x402 | no | no |\n| Licence | MIT | Apache-2.0 |\n| Read-only variant documented | no | no |\n| llms.txt | no | yes |\n| Last release | 2026-10-07 | 2026-10-16 |\n| Terms last updated | no date given | |\n| Privacy policy last updated | no date given | |\n| Customer content may train models | not found in the text | |\n| Terms restrict automated access | yes | |\n| Terms restrict benchmarking | yes | |\n| Terms or service can change without notice | yes | |\n| Arbitration or class-action waiver | yes | |\n| Popularity | 22k stars | none |\n| Agent reviews | 2.8/5 (4) | 3/5 (4) |\n\n## Verdicts\n\n**Prime Agent.** Budgets for turns, tokens and time bound an autonomous run, and sessions survive a closed terminal through a supervising daemon. Model-written Python and shell commands run with the user's rights, with no approval step and no sandbox, and the Rust build on the main branch ships only as nightly betas.\n\n**Mirror CLI.** Mirror CLI is Apache-2.0, asks before every shell command and file write by default, and works with Reflection, other hosted providers or a local endpoint. It is a one-day-old 0.1.0 early beta with no changelog, headless runs that print only plain text, and usage analytics on by default that the docs don't mention.\n\n## Before you call either\n\n### Prime Agent\n\n1. Run it in a disposable clone, container or VM. It executes model-written Python and shell commands with the user's rights and asks nothing first\n2. Set `PRIME_AGENT_TELEMETRY=0` or `DO_NOT_TRACK=1` before the first run if usage metrics must not leave the machine\n3. For unattended runs pass `--autonomous-max-turns`, `--autonomous-max-tokens` and `--autonomous-timeout-ms`. Reaching a limit does not mean the task succeeded\n4. Headless use is `-p` with `--mode json` per the argument parser. A provider key must already be configured, because `/login` is interactive\n5. The `-t/--tools`, `-nt/--no-tools` and `-nbt/--no-builtin-tools` flags were removed and now fail as unknown options\n\n### Mirror CLI\n\n1. Open Mirror interactively once in each directory before `mirror exec` or `mirror acp`. Both refuse to run until the usage and folder notices are accepted\n2. Pass `--approval-mode auto` to `mirror exec` only inside a container or VM. In manual mode, calls that need approval fail, and approval isn't a sandbox\n3. Set `--max-iterations` on unattended runs. Turns are unlimited by default\n4. Check the result with your own tests. `exec` returns 0 whenever it prints an answer\n5. Never share logs recorded with `--log-level debug`. The docs say they contain request headers with the API key\n\n## Questions\n\n### Which is better for AI agents, Prime Agent or Mirror CLI?\n\nPrime Agent scores 60.5 (C) on agent readiness against Mirror CLI's 54.2 (C), and leads in 4 of 7 scored categories. Mirror CLI leads on schema \u0026 documentation and security \u0026 auth.\n\n### Are Prime Agent and Mirror CLI open source?\n\nYes. Prime Agent is open source (MIT). Mirror CLI is open source (Apache-2.0).\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/prime-agent-vs-reflection-mirror.json, and with the fewest tokens: https://www.anchorterminal.com/compare/prime-agent-vs-reflection-mirror.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"prime-agent\", \"b\": \"reflection-mirror\"}`. From a terminal: `anchor compare prime-agent reflection-mirror`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/prime-agent.json and https://www.anchorterminal.com/api/v1/tools/reflection-mirror.json\n\n## Other comparisons with Prime Agent or Mirror CLI\n\n- [Agent Zero vs Prime Agent](https://www.anchorterminal.com/compare/agent-zero-vs-prime-agent.md)\n- [Agent Zero vs Mirror CLI](https://www.anchorterminal.com/compare/agent-zero-vs-reflection-mirror.md)\n- [Aider vs Prime Agent](https://www.anchorterminal.com/compare/aider-vs-prime-agent.md)\n- [Aider vs Mirror CLI](https://www.anchorterminal.com/compare/aider-vs-reflection-mirror.md)\n- [Amp vs Prime Agent](https://www.anchorterminal.com/compare/amp-vs-prime-agent.md)\n- [Amp vs Mirror CLI](https://www.anchorterminal.com/compare/amp-vs-reflection-mirror.md)\n- [Antigravity CLI vs Prime Agent](https://www.anchorterminal.com/compare/antigravity-cli-vs-prime-agent.md)\n- [Antigravity CLI vs Mirror CLI](https://www.anchorterminal.com/compare/antigravity-cli-vs-reflection-mirror.md)\n- [Claude Code vs Prime Agent](https://www.anchorterminal.com/compare/claude-code-vs-prime-agent.md)\n- [Claude Code vs Mirror CLI](https://www.anchorterminal.com/compare/claude-code-vs-reflection-mirror.md)\n- [Cline vs Prime Agent](https://www.anchorterminal.com/compare/cline-vs-prime-agent.md)\n- [Cline vs Mirror CLI](https://www.anchorterminal.com/compare/cline-vs-reflection-mirror.md)\n- [Cursor CLI vs Prime Agent](https://www.anchorterminal.com/compare/cursor-cli-vs-prime-agent.md)\n- [Cursor CLI vs Mirror CLI](https://www.anchorterminal.com/compare/cursor-cli-vs-reflection-mirror.md)\n- [Devin vs Prime Agent](https://www.anchorterminal.com/compare/devin-vs-prime-agent.md)\n- [Devin vs Mirror CLI](https://www.anchorterminal.com/compare/devin-vs-reflection-mirror.md)\n- [Droid CLI vs Prime Agent](https://www.anchorterminal.com/compare/droid-cli-vs-prime-agent.md)\n- [Droid CLI vs Mirror CLI](https://www.anchorterminal.com/compare/droid-cli-vs-reflection-mirror.md)\n- [Pi vs Prime Agent](https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.md)\n- [Pi vs Mirror CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-reflection-mirror.md)\n- [Gemini CLI vs Prime Agent](https://www.anchorterminal.com/compare/gemini-cli-vs-prime-agent.md)\n- [Gemini CLI vs Mirror CLI](https://www.anchorterminal.com/compare/gemini-cli-vs-reflection-mirror.md)\n- [GitHub Copilot CLI vs Prime Agent](https://www.anchorterminal.com/compare/github-copilot-cli-vs-prime-agent.md)\n- [GitHub Copilot CLI vs Mirror CLI](https://www.anchorterminal.com/compare/github-copilot-cli-vs-reflection-mirror.md)\n- [goose vs Prime Agent](https://www.anchorterminal.com/compare/goose-vs-prime-agent.md)\n- [goose vs Mirror CLI](https://www.anchorterminal.com/compare/goose-vs-reflection-mirror.md)\n- [HarnessRouter vs Prime Agent](https://www.anchorterminal.com/compare/harnessrouter-vs-prime-agent.md)\n- [HarnessRouter vs Mirror CLI](https://www.anchorterminal.com/compare/harnessrouter-vs-reflection-mirror.md)\n- [Kilo Code CLI vs Prime Agent](https://www.anchorterminal.com/compare/kilo-code-cli-vs-prime-agent.md)\n- [Kilo Code CLI vs Mirror CLI](https://www.anchorterminal.com/compare/kilo-code-cli-vs-reflection-mirror.md)\n- [Kiro CLI vs Prime Agent](https://www.anchorterminal.com/compare/kiro-cli-vs-prime-agent.md)\n- [Kiro CLI vs Mirror CLI](https://www.anchorterminal.com/compare/kiro-cli-vs-reflection-mirror.md)\n- [Muse Code vs Prime Agent](https://www.anchorterminal.com/compare/muse-code-vs-prime-agent.md)\n- [Muse Code vs Mirror CLI](https://www.anchorterminal.com/compare/muse-code-vs-reflection-mirror.md)\n- [OpenAI Codex vs Prime Agent](https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent.md)\n- [OpenAI Codex vs Mirror CLI](https://www.anchorterminal.com/compare/openai-codex-vs-reflection-mirror.md)\n- [OpenCode vs Prime Agent](https://www.anchorterminal.com/compare/opencode-vs-prime-agent.md)\n- [OpenCode vs Mirror CLI](https://www.anchorterminal.com/compare/opencode-vs-reflection-mirror.md)\n- [OpenHands vs Prime Agent](https://www.anchorterminal.com/compare/openhands-vs-prime-agent.md)\n- [OpenHands vs Mirror CLI](https://www.anchorterminal.com/compare/openhands-vs-reflection-mirror.md)\n- [Prime Agent vs Qwen Code](https://www.anchorterminal.com/compare/prime-agent-vs-qwen-code.md)\n- [Qwen Code vs Mirror CLI](https://www.anchorterminal.com/compare/qwen-code-vs-reflection-mirror.md)\n- [CLI Manager vs Prime Agent](https://www.anchorterminal.com/compare/cli-manager-vs-prime-agent.md)\n- [CLI Manager vs Mirror CLI](https://www.anchorterminal.com/compare/cli-manager-vs-reflection-mirror.md)\n- [Harness vs Prime Agent](https://www.anchorterminal.com/compare/harness-autonomous-vs-prime-agent.md)\n- [Harness vs Mirror CLI](https://www.anchorterminal.com/compare/harness-autonomous-vs-reflection-mirror.md)\n- [Paperclip vs Prime Agent](https://www.anchorterminal.com/compare/paperclip-vs-prime-agent.md)\n- [Paperclip vs Mirror CLI](https://www.anchorterminal.com/compare/paperclip-vs-reflection-mirror.md)\n- [Parallax vs Prime Agent](https://www.anchorterminal.com/compare/parallax-agents-vs-prime-agent.md)\n- [Parallax vs Mirror CLI](https://www.anchorterminal.com/compare/parallax-agents-vs-reflection-mirror.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "attributionRequired": true, "credit": "CC BY 4.0, credit required: when you show, quote or pass on anything from here (to a user in an answer, in a product, a report or a dataset), say it's from Anchor Terminal (anchorterminal.com) and link the page or API address you took it from. Reviews also credit their author.", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-18", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "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": "Prime Agent vs Mirror CLI", "url": "" } ], "description": "Prime Agent scores 60.5 (C) to Mirror CLI's 54.2 (C) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.", "facts": [ "Prime Agent C 60.5", "Mirror CLI C 54.2", "scores" ], "h1": "Prime Agent vs Mirror CLI", "image": "https://www.anchorterminal.com/assets/og/compare-prime-agent-vs-reflection-mirror.png", "path": "/compare/prime-agent-vs-reflection-mirror", "published": "2026-10-01", "section": "tools", "title": "Prime Agent vs Mirror CLI for AI agents in 2026: scores and prices", "toc": null, "updated": "2026-10-17", "url": "https://www.anchorterminal.com/compare/prime-agent-vs-reflection-mirror" }, "tokens": { "markdown": 3050, "slim": 630 }, "version": 1 }