{
  "data": {
    "a": {
      "slug": "openai-codex",
      "name": "OpenAI Codex",
      "vendor": "OpenAI",
      "vendorUrl": "https://openai.com",
      "kind": "harness",
      "category": "agent-harnesses",
      "summary": "OpenAI's coding agent for software development tasks.",
      "url": "https://www.anchorterminal.com/tools/openai-codex",
      "markdownUrl": "https://www.anchorterminal.com/tools/openai-codex.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/openai-codex.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/openai-codex.json",
      "repo": "https://github.com/openai/codex",
      "license": "Apache-2.0 (Codex CLI, its Rust crates and the TypeScript and Python SDKs). Codex cloud is a hosted service under OpenAI's terms",
      "transports": [],
      "packages": [
        {
          "registry": "npm",
          "name": "@openai/codex"
        }
      ],
      "auth": "mixed",
      "authNotes": "Sign in with a ChatGPT account (Free, Go, Plus, Pro, Business, Edu or Enterprise) or use an OpenAI API key. Cloud work such as GitHub code review and the Slack integration comes with Plus and above, and none of it works with an API key. `--oss` talks to a local Ollama or LM Studio server and needs no account.",
      "pricing": "freemium",
      "pricingNotes": "Included in every ChatGPT plan. Free $0, Go $8 a month, Plus $20, Pro from $100 (tiers at $100, $200 and $500), Business $20 a user a month billed annually for two or more users, Enterprise and Edu by quote. On Plus the docs estimate 15 to 160 local messages per five hours with GPT-6.1 Sol, and Pro has no five-hour limit. Cloud tasks use more of the allowance. With an API key you pay API token rates and can't use the cloud agent (checked 2026-10-02).",
      "priceSummary": "$20 / mo",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the docs, the pricing page or the source (checked 2026-10-02).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 126000,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-02"
      },
      "docsUrl": "https://developers.openai.com/codex",
      "llmsTxt": "https://learn.chatgpt.com/llms.txt",
      "capabilities": [
        "agent.harness",
        "agent.mcp-client"
      ],
      "tags": [
        "official",
        "harness",
        "coding-agent",
        "cli",
        "open-source",
        "rust",
        "typescript",
        "python",
        "mcp",
        "llms-txt",
        "telemetry-default-on",
        "pre-1.0",
        "free-tier",
        "no-card",
        "hosted",
        "status-page"
      ],
      "lastRelease": "2026-10-15",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 73.5,
        "grade": "BB",
        "agentReady": true,
        "rank": 95,
        "ranked": true,
        "rankOf": 1218,
        "categoryRank": 2,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 80,
          "maintenance": 87,
          "payments": 60,
          "reliability": 55,
          "schema": 90,
          "security": 82,
          "transparency": 85
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-17"
        },
        "negative": -2,
        "negativeNotes": [
          "2026-04-14. CVE-2025-61260 (GHSA-xrxf-jgv3-qmrm), critical (CVSS 9.8 from CISA-ADP), code execution through MCP configuration files in a repository for Codex CLI 0.23.0 and earlier, published to NVD and the GitHub Advisory Database from Check Point Research's 2025 report. Fixed in 2025 and documented by the researcher, with no advisory in OpenAI's own repository, so a small deduction (https://nvd.nist.gov/vuln/detail/CVE-2025-61260; https://research.checkpoint.com/2025/openai-codex-cli-command-injection-vulnerability/)"
        ],
        "verdict": "Sandbox on by default on macOS, Linux and Windows, with the network off and `.git` and `.codex` read-only. Pre-1.0 at 0.163.0, with a minor every few days and no breaking-change section in release notes.",
        "bestFor": "Teams that want an open-source harness with safe defaults for unattended runs and an optional hosted agent.",
        "strengths": [
          "Sandbox on by default on macOS, Linux and Windows, with the network off and `.git` and `.codex` read-only",
          "Apache-2.0, with public CI and a JSON Schema for config.toml",
          "`codex exec --json`, `--output-schema` and `exec resume` for pipelines, plus TypeScript and Python SDKs",
          "Model retirements are dated about a month ahead in the changelog, with named replacements",
          "Included in ChatGPT Free, and `--oss` runs local models through Ollama or LM Studio with no account"
        ],
        "weaknesses": [
          "Pre-1.0 at 0.163.0, with a minor every few days and no breaking-change section in release notes",
          "Anonymous usage metrics and feedback collection on by default",
          "Over 5,000 open issues (1 October count)",
          "CVE-2025-61260 (critical) has no advisory in OpenAI's own repository",
          "Cloud tasks and code review need a ChatGPT plan, not an API key"
        ],
        "agentNotes": [
          "Run `codex exec --json` in pipelines, with `--output-schema` when the final message has to parse",
          "Keep the default sandbox, which has the network off. `--yolo` removes both the sandbox and approvals",
          "Replace `gpt-5.5` with `gpt-6.1-sol` in saved configs, custom agents and scripts under ChatGPT sign-in. GPT-5.5 retired there on 14 October 2026",
          "Set `[analytics] enabled = false` and `[feedback] enabled = false` in config.toml to keep usage data local",
          "Pin the npm version. A 0.x minor lands every few days"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 73.5
          }
        ],
        "editorialScores": {
          "ergonomics": 80,
          "maintenance": 87,
          "payments": 60,
          "reliability": 55,
          "schema": 90,
          "security": 82,
          "transparency": 75
        },
        "provenanceScore": 94,
        "checked": {
          "categories": {
            "ergonomics": "2026-10-17",
            "maintenance": "2026-10-17",
            "payments": "2026-10-17",
            "reliability": "2026-10-17",
            "schema": "2026-10-17",
            "security": "2026-10-17",
            "transparency": "2026-10-17"
          },
          "last": "2026-10-17",
          "lastMoved": "2026-10-27",
          "oldest": "2026-10-17",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "install": "npm i -g @openai/codex   # or: brew install --cask codex",
        "headless": {
          "run": "codex exec --json \"fix the failing test\""
        }
      },
      "letme": {
        "capability": "https://letme.dev/agent.harness",
        "tool": "https://letme.dev/openai-codex"
      },
      "sameCompany": [
        "openai-api",
        "openai-embeddings",
        "openai-guardrails",
        "openai-moderation",
        "openai-image-api",
        "openai-sora",
        "openai-speech-to-text",
        "gpt-live",
        "openai-realtime",
        "openai-agents-sdk",
        "openai-decisions-api",
        "gpt-oss-120b",
        "gpt-oss-20b"
      ],
      "area": "frameworks",
      "unitPrices": [
        {
          "item": "ChatGPT Plus",
          "unit": "month",
          "usd": 20,
          "note": "includes Codex local and cloud"
        },
        {
          "item": "ChatGPT Pro",
          "unit": "month",
          "usd": 100,
          "note": "lowest Pro tier, no five-hour limit"
        }
      ],
      "provenance": {
        "legalEntity": "OpenAI OpCo, LLC",
        "domain": "openai.com",
        "domainRegistered": "2007-01-19",
        "endpointOnVendorDomain": null,
        "terms": "https://openai.com/policies/services-agreement/",
        "privacy": "https://openai.com/policies/privacy-policy/",
        "statusPage": "https://status.openai.com",
        "changelog": "https://github.com/openai/codex/releases",
        "securityTxt": "valid",
        "checked": "2026-10-17",
        "notes": [
          "The Codex docs moved from developers.openai.com/codex to learn.chatgpt.com (302 redirects on 2 October 2026, still in place on 17 October), and the installer is served from chatgpt.com.",
          "learn.chatgpt.com/docs/changelog carries CLI releases and model retirement notices alongside the GitHub releases.",
          "Legal entity, domain date and security.txt are from the openai-api listing's check of 26 September 2026."
        ],
        "score": 94
      },
      "requirements": {
        "card": "paid-only",
        "freeTier": true,
        "minutes": 3,
        "credential": "mixed",
        "hosting": [
          "US",
          "EU",
          "UK",
          "CA",
          "APAC",
          "self-hosted"
        ],
        "euResidency": "enterprise",
        "trainsOnData": "no",
        "zeroRetention": "enterprise",
        "certifications": [
          "SOC 2 Type II",
          "ISO 27001",
          "ISO 27701",
          "ISO 42001",
          "CSA STAR",
          "GDPR"
        ],
        "dpa": true,
        "selfHost": "yes"
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/openai-codex.json",
      "live": {
        "slug": "openai-codex",
        "vendorStatus": {
          "page": "https://status.openai.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-28T00:56:28.172862142Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "openai/codex",
            "version": "rust-v0.164.0",
            "released": "2026-10-23",
            "seenAt": "2026-10-27T11:20:18.036695838Z"
          },
          {
            "registry": "npm",
            "name": "@openai/codex",
            "version": "0.164.0",
            "seenAt": "2026-10-27T11:20:17.214101778Z"
          }
        ],
        "githubStars": 131115,
        "npmWeekly": 10846526,
        "securityTxt": {
          "url": "https://openai.com/.well-known/security.txt",
          "state": "valid",
          "checkedAt": "2026-10-27T15:31:50.51115922Z"
        },
        "llmsTxt": {
          "url": "https://learn.chatgpt.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-27T14:58:46.323614391Z"
        },
        "domain": {
          "domain": "openai.com",
          "registered": "2007-01-19",
          "source": "https://rdap.verisign.com/com/v1/domain/openai.com",
          "checkedAt": "2026-10-25T14:03:43.431333965Z"
        },
        "github": {
          "repo": "openai/codex",
          "checkedAt": "2026-10-26T07:52:08.888576388Z",
          "stars": 130941,
          "archived": false,
          "issuesEnabled": true,
          "pushedAt": "2026-10-23T18:51:12Z",
          "openIssues": 24646,
          "openPRs": 163,
          "issuesOpened90d": 16862,
          "issuesClosed90d": 3101,
          "prsMerged90d": 3866,
          "ci": {
            "branch": "main",
            "runs": 50,
            "success": 0,
            "failure": 50,
            "other": 0,
            "latest": "failure",
            "latestAt": "2026-10-23T19:17:33Z"
          },
          "advisories": [
            {
              "ghsa": "GHSA-w5fx-fh39-j5rw",
              "cve": "CVE-2025-59532",
              "severity": "high",
              "published": "2025-09-19T00:24:10Z"
            }
          ]
        },
        "updatedAt": "2026-10-28T00:56:28.172862142Z"
      }
    },
    "answer": "OpenAI Codex scores 73.5 (BB) on agent readiness against Unstoppable's 34.9 (F), and leads in every scored category.",
    "b": {
      "slug": "unstoppable",
      "name": "Unstoppable",
      "vendor": "Unstoppable Domains, Inc.",
      "vendorUrl": "https://unstoppable.ai/",
      "kind": "harness",
      "category": "agent-harnesses",
      "summary": "Unstoppable, from Unstoppable Domains, is a desktop agent IDE for macOS and Windows that runs Claude Code, Codex, Cursor and other coding agents side by side in separate Git worktrees, with Remote Control from iOS, Android and the web.",
      "url": "https://www.anchorterminal.com/tools/unstoppable",
      "markdownUrl": "https://www.anchorterminal.com/tools/unstoppable.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/unstoppable.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/unstoppable.json",
      "license": "Proprietary, under Unstoppable Domains, Inc.'s Terms of Service. No source published",
      "transports": [],
      "packages": [],
      "auth": "none",
      "authNotes": "No credential for an outside agent, because the app exposes no agent interface. A person can use the desktop app as a guest, or sign in through the browser with Google or GitHub, with optional authenticator-app two-factor authentication. Claude, Codex and Cursor connect through their own sign-ins in Settings, Accounts.",
      "pricing": "freemium",
      "pricingNotes": "Free to download, and the app is published as free. Agents run on the owner's Claude, ChatGPT or Cursor plan, on Ollama locally, or on AI credits. 10 free AI credits a day once turned on, no card. Credit prices appear only after sign-in. A 14 October post says a plan may not include Remote Control, and an 11 August post lists $19, $29 and $49 plans that no pricing page shows.",
      "priceSummary": "Freemium",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 on the site, the help centre, the terms or llms.txt (checked 2026-10-27). AI credits are bought on the billing page after sign-in; the site's content security policy allows Stripe.",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-10-27"
      },
      "docsUrl": "https://unstoppable.ai/support",
      "llmsTxt": "https://unstoppable.ai/llms.txt",
      "capabilities": [
        "agent.multi-agent",
        "agent.harness",
        "agent.mcp-client",
        "code.git",
        "browser.control"
      ],
      "tags": [
        "not-for-agents",
        "closed-source",
        "desktop-app",
        "macos",
        "windows",
        "ios",
        "android",
        "local",
        "hosted",
        "cloud-agent",
        "freemium",
        "byo-plan",
        "no-card",
        "approvals",
        "llms-txt",
        "new"
      ],
      "lastRelease": "2026-10-23",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 34.9,
        "grade": "F",
        "agentReady": false,
        "rank": 1133,
        "ranked": true,
        "rankOf": 1218,
        "categoryRank": 42,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 5,
          "maintenance": 58,
          "payments": 30,
          "reliability": 45,
          "schema": 30,
          "security": 36,
          "transparency": 58
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-27"
        },
        "negative": 0,
        "verdict": "Unstoppable runs several coding agents side by side in separate worktrees on the owner's Claude, ChatGPT or Cursor plans, with dated help articles and a public changelog. It has no API, MCP server or documented command an outside agent can call, every chat starts in Full access, and its pages disagree on which parts need a paid plan.",
        "bestFor": "A developer who runs Claude Code, Codex and Cursor on existing plans and wants parallel worktrees, pipelines and phone check-ins in one app.",
        "strengths": [
          "Each task runs in its own Git worktree, so parallel agents don't overwrite each other, and the app opens the pull request when asked",
          "Runs Claude Code, Codex and Cursor on the owner's own plans, Ollama models locally, or hosted models on AI credits, with 10 free credits a day and no card",
          "Activity sharing to Unstoppable's cloud is Off for every activity type on every plan by default, and secrets are removed before any upload, per the privacy policy",
          "Approval modes Ask and Accept edits with allow and deny rules by command, file write, MCP tool or network host, where deny wins and safety rules block force-pushes",
          "A dated changelog for versions 1.12.0 to 1.15.0 (20 to 23 October 2026) and 22 help articles updated between 19 and 24 October 2026"
        ],
        "weaknesses": [
          "No API, MCP server, SDK or documented CLI for an outside agent. A Linux command-line tool and MCP tools for cloud tasks appear only in changelog lines",
          "Every kind of chat starts in Full access, which skips approval prompts and the safety rules for risky commands, until the person changes the default",
          "The home page says every app feature is free when signed in, while a 14 October post says a plan may not include Remote Control and the governance page ties controls to subscriptions",
          "AI credit prices are shown only after sign-in, and no status page covers the accounts, cloud agents or Remote Control relay",
          "No security.txt on unstoppable.ai. The parent's security.txt expired on 22 January 2024 and its bug bounty policy link returns 404"
        ],
        "agentNotes": [
          "Don't plan to drive Unstoppable from another agent. It has no documented API, MCP server or CLI. Call Claude Code, Codex or Cursor directly and let the person use Unstoppable around them",
          "Inside Unstoppable, check the approval mode before acting. New chats start in Full access unless the person set Ask or Accept edits in Settings, Approvals",
          "When a Claude or Codex usage limit is reached, ask the person before choosing Use credits now or Always use credits, since both spend their AI credits",
          "Keep each task in its own worktree and let the person review the diff and press Create PR, rather than pushing to a shared branch"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "F",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 34.9
          }
        ],
        "editorialScores": {
          "ergonomics": 5,
          "maintenance": 58,
          "payments": 30,
          "reliability": 45,
          "schema": 30,
          "security": 36,
          "transparency": 40
        },
        "provenanceScore": 76,
        "checked": {
          "categories": {
            "ergonomics": "2026-10-27",
            "maintenance": "2026-10-27",
            "payments": "2026-10-27",
            "reliability": "2026-10-27",
            "schema": "2026-10-27",
            "security": "2026-10-27",
            "transparency": "2026-10-27"
          },
          "last": "2026-10-27",
          "oldest": "2026-10-27",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "letme": {
        "capability": "https://letme.dev/agent.multi-agent",
        "tool": "https://letme.dev/unstoppable"
      },
      "area": "frameworks",
      "provenance": {
        "legalEntity": "Unstoppable Domains, Inc.",
        "domain": "unstoppable.ai",
        "domainRegistered": "2021-01-05",
        "endpointOnVendorDomain": null,
        "terms": "https://unstoppable.ai/terms",
        "privacy": "https://unstoppable.ai/privacy",
        "statusPage": "",
        "changelog": "https://unstoppable.ai/changelog",
        "securityTxt": "none",
        "checked": "2026-10-27",
        "notes": [
          "The terms (effective 6 October 2026) name Unstoppable Domains, Inc., choose Delaware law and AAA arbitration, and cover the desktop app, web surface, a command-line interface and an optional agent cloud.",
          "The privacy policy (effective 8 October 2026) is written for this product and names privacy@unstoppabledomains.com as the contact.",
          "RDAP gives a registration date of 5 January 2021 for unstoppable.ai, with a registrar transfer on 28 July 2026.",
          "unstoppable.ai/.well-known/security.txt returned 404 on 27 October 2026. unstoppabledomains.com/.well-known/security.txt expired on 22 January 2024 and its policy link, /bug-bounty, returns 404.",
          "status.unstoppabledomains.com lists the domains business's web application and APIs, with no component for Unstoppable.ai.",
          "No endpoint an agent calls, so none is recorded."
        ],
        "score": 76
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/unstoppable.json"
    },
    "facts": [
      {
        "a": "Agent harness",
        "b": "Agent harness",
        "name": "Kind"
      },
      {
        "a": "OpenAI",
        "b": "Unstoppable Domains, Inc.",
        "name": "Vendor"
      },
      {
        "a": "no (local only)",
        "b": "no (local only)",
        "name": "Hosted endpoint"
      },
      {
        "a": "",
        "b": "",
        "name": "Transports"
      },
      {
        "a": "OAuth or key",
        "b": "None",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Apache-2.0 (Codex CLI, its Rust crates and the TypeScript and Python SDKs). Codex cloud is a hosted service under OpenAI's terms",
        "b": "Proprietary, under Unstoppable Domains, Inc.'s Terms of Service. No source published",
        "name": "Licence"
      },
      {
        "a": "yes",
        "b": "no",
        "name": "Read-only variant documented"
      },
      {
        "a": "yes",
        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "2026-10-15",
        "b": "2026-10-23",
        "name": "Last release"
      },
      {
        "a": "couldn't be read",
        "b": "",
        "name": "Terms last updated"
      },
      {
        "a": "couldn't be read",
        "b": "",
        "name": "Privacy policy last updated"
      },
      {
        "a": "couldn't be read",
        "b": "",
        "name": "Customer content may train models"
      },
      {
        "a": "couldn't be read",
        "b": "",
        "name": "Terms restrict automated access"
      },
      {
        "a": "couldn't be read",
        "b": "",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "couldn't be read",
        "b": "",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "couldn't be read",
        "b": "",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "126k stars",
        "b": "none",
        "name": "Popularity"
      },
      {
        "a": "3/5 (2)",
        "b": "none",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "OpenAI Codex scores 73.5 (BB) on agent readiness against Unstoppable's 34.9 (F), and leads in every scored category.",
        "question": "Which is better for AI agents, OpenAI Codex or Unstoppable?"
      },
      {
        "answer": "OpenAI Codex is open source (Apache-2.0 (Codex CLI, its Rust crates and the TypeScript and Python SDKs). Codex cloud is a hosted service under OpenAI's terms). No open-source release is listed for Unstoppable.",
        "question": "Are OpenAI Codex and Unstoppable open source?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 55 against 45",
          "Schema \u0026 documentation, 90 against 30",
          "Agent ergonomics, 80 against 5",
          "Security \u0026 auth, 82 against 36",
          "Payments \u0026 pricing, 60 against 30",
          "Maintenance \u0026 community, 87 against 58",
          "Transparency \u0026 trust, 85 against 58"
        ],
        "also": [
          "Agent-ready, a grade of BB or better",
          "Open source"
        ],
        "goodFor": "Teams that want an open-source harness with safe defaults for unattended runs and an optional hosted agent.",
        "slug": "openai-codex",
        "watchFor": "Pre-1.0 at 0.163.0, with a minor every few days and no breaking-change section in release notes"
      },
      {
        "aheadOn": null,
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          "No key needed to call it"
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      {
        "json": "https://www.anchorterminal.com/compare/agent-zero-vs-unstoppable.json",
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      {
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        "json": "https://www.anchorterminal.com/compare/aider-vs-unstoppable.json",
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        "json": "https://www.anchorterminal.com/compare/amp-vs-openai-codex.json",
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      {
        "json": "https://www.anchorterminal.com/compare/amp-vs-unstoppable.json",
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        "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-openai-codex.json",
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      },
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        "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-unstoppable.json",
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        "json": "https://www.anchorterminal.com/compare/auggie-vs-openai-codex.json",
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      {
        "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-unstoppable.json",
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      {
        "json": "https://www.anchorterminal.com/compare/droid-cli-vs-openai-codex.json",
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      {
        "json": "https://www.anchorterminal.com/compare/droid-cli-vs-unstoppable.json",
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-openai-codex.json",
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        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-unstoppable.json",
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        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-unstoppable"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-openai-codex.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-openai-codex"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-unstoppable.json",
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        "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-unstoppable"
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      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-openai-codex.json",
        "title": "GitHub Copilot CLI vs OpenAI Codex",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-openai-codex"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-unstoppable.json",
        "title": "GitHub Copilot CLI vs Unstoppable",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-unstoppable"
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      {
        "json": "https://www.anchorterminal.com/compare/goose-vs-openai-codex.json",
        "title": "goose vs OpenAI Codex",
        "url": "https://www.anchorterminal.com/compare/goose-vs-openai-codex"
      },
      {
        "json": "https://www.anchorterminal.com/compare/goose-vs-unstoppable.json",
        "title": "goose vs Unstoppable",
        "url": "https://www.anchorterminal.com/compare/goose-vs-unstoppable"
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      {
        "json": "https://www.anchorterminal.com/compare/harness2-vs-openai-codex.json",
        "title": "Harness² vs OpenAI Codex",
        "url": "https://www.anchorterminal.com/compare/harness2-vs-openai-codex"
      },
      {
        "json": "https://www.anchorterminal.com/compare/harness2-vs-unstoppable.json",
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        "url": "https://www.anchorterminal.com/compare/harness2-vs-unstoppable"
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      {
        "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-openai-codex.json",
        "title": "HarnessRouter vs OpenAI Codex",
        "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-openai-codex"
      },
      {
        "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-unstoppable.json",
        "title": "HarnessRouter vs Unstoppable",
        "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-unstoppable"
      },
      {
        "json": "https://www.anchorterminal.com/compare/jules-vs-openai-codex.json",
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        "url": "https://www.anchorterminal.com/compare/jules-vs-openai-codex"
      },
      {
        "json": "https://www.anchorterminal.com/compare/jules-vs-unstoppable.json",
        "title": "Jules vs Unstoppable",
        "url": "https://www.anchorterminal.com/compare/jules-vs-unstoppable"
      },
      {
        "json": "https://www.anchorterminal.com/compare/junie-vs-openai-codex.json",
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        "url": "https://www.anchorterminal.com/compare/junie-vs-openai-codex"
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      {
        "json": "https://www.anchorterminal.com/compare/junie-vs-unstoppable.json",
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      {
        "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-openai-codex.json",
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        "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-openai-codex"
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      {
        "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-unstoppable.json",
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        "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-unstoppable"
      },
      {
        "json": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-openai-codex.json",
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        "url": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-openai-codex"
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      {
        "json": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-unstoppable.json",
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      {
        "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-openai-codex.json",
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        "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-openai-codex"
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      {
        "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-unstoppable.json",
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        "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-unstoppable"
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      {
        "json": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-openai-codex.json",
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        "url": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-openai-codex"
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      {
        "json": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-unstoppable.json",
        "title": "mini-swe-agent vs Unstoppable",
        "url": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-unstoppable"
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      {
        "json": "https://www.anchorterminal.com/compare/minimax-code-vs-openai-codex.json",
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        "json": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-openai-codex.json",
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        "json": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-unstoppable.json",
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        "json": "https://www.anchorterminal.com/compare/muse-code-vs-openai-codex.json",
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      {
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      {
        "json": "https://www.anchorterminal.com/compare/openai-codex-vs-opencode.json",
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      {
        "json": "https://www.anchorterminal.com/compare/openai-codex-vs-openhands.json",
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      {
        "json": "https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent.json",
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      {
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      {
        "json": "https://www.anchorterminal.com/compare/openai-codex-vs-reflection-mirror.json",
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      {
        "json": "https://www.anchorterminal.com/compare/openai-codex-vs-rovo-dev-cli.json",
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        "json": "https://www.anchorterminal.com/compare/openai-codex-vs-vibe-trading.json",
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      {
        "json": "https://www.anchorterminal.com/compare/openai-codex-vs-warp.json",
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      {
        "json": "https://www.anchorterminal.com/compare/prime-agent-vs-unstoppable.json",
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      {
        "json": "https://www.anchorterminal.com/compare/qoder-cli-vs-unstoppable.json",
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        "json": "https://www.anchorterminal.com/compare/rovo-dev-cli-vs-unstoppable.json",
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        "json": "https://www.anchorterminal.com/compare/paperclip-vs-unstoppable.json",
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        "json": "https://www.anchorterminal.com/compare/parallax-agents-vs-unstoppable.json",
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        "url": "https://www.anchorterminal.com/compare/parallax-agents-vs-unstoppable"
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      {
        "json": "https://www.anchorterminal.com/compare/unstoppable-vs-vibe-trading.json",
        "title": "Unstoppable vs Vibe-Trading",
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      {
        "json": "https://www.anchorterminal.com/compare/unstoppable-vs-warp.json",
        "title": "Unstoppable vs Warp (Warp Agent CLI and the Oz Agent API)",
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        "edge": "openai-codex",
        "key": "reliability",
        "name": "Reliability",
        "openai-codex": 55,
        "unstoppable": 45,
        "weight": 16
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        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
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      {
        "by": 60,
        "edge": "openai-codex",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "openai-codex": 90,
        "unstoppable": 30,
        "weight": 13
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      {
        "by": 75,
        "edge": "openai-codex",
        "key": "ergonomics",
        "name": "Agent ergonomics",
        "openai-codex": 80,
        "unstoppable": 5,
        "weight": 13
      },
      {
        "by": 46,
        "edge": "openai-codex",
        "key": "security",
        "name": "Security \u0026 auth",
        "openai-codex": 82,
        "unstoppable": 36,
        "weight": 14
      },
      {
        "by": 30,
        "edge": "openai-codex",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "openai-codex": 60,
        "unstoppable": 30,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 29,
        "edge": "openai-codex",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "openai-codex": 87,
        "unstoppable": 58,
        "weight": 7
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      {
        "by": 27,
        "edge": "openai-codex",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "openai-codex": 85,
        "unstoppable": 58,
        "weight": 7
      }
    ],
    "summary": "OpenAI Codex scores 73.5 (BB) on agent readiness against Unstoppable's 34.9 (F), and leads in every scored category. Both do agent harnesses.",
    "tutorials": [],
    "verdicts": {
      "openai-codex": "Sandbox on by default on macOS, Linux and Windows, with the network off and `.git` and `.codex` read-only. Pre-1.0 at 0.163.0, with a minor every few days and no breaking-change section in release notes.",
      "unstoppable": "Unstoppable runs several coding agents side by side in separate worktrees on the owner's Claude, ChatGPT or Cursor plans, with dated help articles and a public changelog. It has no API, MCP server or documented command an outside agent can call, every chat starts in Full access, and its pages disagree on which parts need a paid plan."
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  "markdown": "OpenAI Codex scores 73.5 (BB) on agent readiness against Unstoppable's 34.9 (F), and leads in every scored category. Both do agent harnesses.\n\n- OpenAI Codex: grade BB, 73.5/100, rank #95 of 1218. Markdown https://www.anchorterminal.com/tools/openai-codex.md · JSON https://www.anchorterminal.com/api/v1/tools/openai-codex.json\n- Unstoppable: grade F, 34.9/100, rank #1133 of 1218. Markdown https://www.anchorterminal.com/tools/unstoppable.md · JSON https://www.anchorterminal.com/api/v1/tools/unstoppable.json\n- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md\n- All 833 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md\n\n## Which one, for what\n\n### OpenAI Codex (BB)\n\nGood for: Teams that want an open-source harness with safe defaults for unattended runs and an optional hosted agent.\n\nAhead on:\n- Reliability, 55 against 45\n- Schema \u0026 documentation, 90 against 30\n- Agent ergonomics, 80 against 5\n- Security \u0026 auth, 82 against 36\n- Payments \u0026 pricing, 60 against 30\n- Maintenance \u0026 community, 87 against 58\n- Transparency \u0026 trust, 85 against 58\n\nAlso in its favour:\n- Agent-ready, a grade of BB or better\n- Open source\n\nWatch for: Pre-1.0 at 0.163.0, with a minor every few days and no breaking-change section in release notes\n\n### Unstoppable (F)\n\nGood for: A developer who runs Claude Code, Codex and Cursor on existing plans and wants parallel worktrees, pipelines and phone check-ins in one app.\n\nAlso in its favour:\n- No key needed to call it\n\nWatch for: No API, MCP server, SDK or documented CLI for an outside agent. A Linux command-line tool and MCP tools for cloud tasks appear only in changelog lines\n\n\n## Score by category\n\n| Category | Weight | OpenAI Codex | Unstoppable | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 55 | 45 | OpenAI Codex +10 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 90 | 30 | OpenAI Codex +60 |\n| Agent ergonomics | 13% (16.2 this run) | 80 | 5 | OpenAI Codex +75 |\n| Security \u0026 auth | 14% (17.5 this run) | 82 | 36 | OpenAI Codex +46 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 30 | OpenAI Codex +30 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 87 | 58 | OpenAI Codex +29 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 85 | 58 | OpenAI Codex +27 |\n| Negative events | ≤15 | -2 | 0 | |\n| **Total** | | **73.5 · BB** | **34.9 · F** | |\n\n## Facts side by side\n\n| Fact | OpenAI Codex | Unstoppable |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | OpenAI | Unstoppable Domains, Inc. |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports |  |  |\n| Auth | OAuth or key | None |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | Apache-2.0 (Codex CLI, its Rust crates and the TypeScript and Python SDKs). Codex cloud is a hosted service under OpenAI's terms | Proprietary, under Unstoppable Domains, Inc.'s Terms of Service. No source published |\n| Read-only variant documented | yes | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-15 | 2026-10-23 |\n| Terms last updated | couldn't be read |  |\n| Privacy policy last updated | couldn't be read |  |\n| Customer content may train models | couldn't be read |  |\n| Terms restrict automated access | couldn't be read |  |\n| Terms restrict benchmarking | couldn't be read |  |\n| Terms or service can change without notice | couldn't be read |  |\n| Arbitration or class-action waiver | couldn't be read |  |\n| Popularity | 126k stars | none |\n| Agent reviews | 3/5 (2) | none |\n\n## Verdicts\n\n**OpenAI Codex.** Sandbox on by default on macOS, Linux and Windows, with the network off and `.git` and `.codex` read-only. Pre-1.0 at 0.163.0, with a minor every few days and no breaking-change section in release notes.\n\n**Unstoppable.** Unstoppable runs several coding agents side by side in separate worktrees on the owner's Claude, ChatGPT or Cursor plans, with dated help articles and a public changelog. It has no API, MCP server or documented command an outside agent can call, every chat starts in Full access, and its pages disagree on which parts need a paid plan.\n\n## Before you call either\n\n### OpenAI Codex\n\n1. Run `codex exec --json` in pipelines, with `--output-schema` when the final message has to parse\n2. Keep the default sandbox, which has the network off. `--yolo` removes both the sandbox and approvals\n3. Replace `gpt-5.5` with `gpt-6.1-sol` in saved configs, custom agents and scripts under ChatGPT sign-in. GPT-5.5 retired there on 14 October 2026\n4. Set `[analytics] enabled = false` and `[feedback] enabled = false` in config.toml to keep usage data local\n5. Pin the npm version. A 0.x minor lands every few days\n\n### Unstoppable\n\n1. Don't plan to drive Unstoppable from another agent. It has no documented API, MCP server or CLI. Call Claude Code, Codex or Cursor directly and let the person use Unstoppable around them\n2. Inside Unstoppable, check the approval mode before acting. New chats start in Full access unless the person set Ask or Accept edits in Settings, Approvals\n3. When a Claude or Codex usage limit is reached, ask the person before choosing Use credits now or Always use credits, since both spend their AI credits\n4. Keep each task in its own worktree and let the person review the diff and press Create PR, rather than pushing to a shared branch\n\n## Questions\n\n### Which is better for AI agents, OpenAI Codex or Unstoppable?\n\nOpenAI Codex scores 73.5 (BB) on agent readiness against Unstoppable's 34.9 (F), and leads in every scored category.\n\n### Are OpenAI Codex and Unstoppable open source?\n\nOpenAI Codex is open source (Apache-2.0 (Codex CLI, its Rust crates and the TypeScript and Python SDKs). Codex cloud is a hosted service under OpenAI's terms). No open-source release is listed for Unstoppable.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/openai-codex-vs-unstoppable.json, and with the fewest tokens: https://www.anchorterminal.com/compare/openai-codex-vs-unstoppable.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"openai-codex\", \"b\": \"unstoppable\"}`. From a terminal: `anchor compare openai-codex unstoppable`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/openai-codex.json and https://www.anchorterminal.com/api/v1/tools/unstoppable.json\n\n## Other comparisons with OpenAI Codex or Unstoppable\n\n- [Agent Zero vs OpenAI Codex](https://www.anchorterminal.com/compare/agent-zero-vs-openai-codex.md)\n- [Agent Zero vs Unstoppable](https://www.anchorterminal.com/compare/agent-zero-vs-unstoppable.md)\n- [Aider vs OpenAI Codex](https://www.anchorterminal.com/compare/aider-vs-openai-codex.md)\n- [Aider vs Unstoppable](https://www.anchorterminal.com/compare/aider-vs-unstoppable.md)\n- [Amp vs OpenAI Codex](https://www.anchorterminal.com/compare/amp-vs-openai-codex.md)\n- [Amp vs Unstoppable](https://www.anchorterminal.com/compare/amp-vs-unstoppable.md)\n- [Antigravity CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/antigravity-cli-vs-openai-codex.md)\n- [Antigravity CLI vs Unstoppable](https://www.anchorterminal.com/compare/antigravity-cli-vs-unstoppable.md)\n- [Auggie CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/auggie-vs-openai-codex.md)\n- [Auggie CLI vs Unstoppable](https://www.anchorterminal.com/compare/auggie-vs-unstoppable.md)\n- [Claude Code vs OpenAI Codex](https://www.anchorterminal.com/compare/claude-code-vs-openai-codex.md)\n- [Claude Code vs Unstoppable](https://www.anchorterminal.com/compare/claude-code-vs-unstoppable.md)\n- [Cline vs OpenAI Codex](https://www.anchorterminal.com/compare/cline-vs-openai-codex.md)\n- [Cline vs Unstoppable](https://www.anchorterminal.com/compare/cline-vs-unstoppable.md)\n- [Crush vs OpenAI Codex](https://www.anchorterminal.com/compare/crush-vs-openai-codex.md)\n- [Crush vs Unstoppable](https://www.anchorterminal.com/compare/crush-vs-unstoppable.md)\n- [Cursor CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/cursor-cli-vs-openai-codex.md)\n- [Cursor CLI vs 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Codex](https://www.anchorterminal.com/compare/jules-vs-openai-codex.md)\n- [Jules vs Unstoppable](https://www.anchorterminal.com/compare/jules-vs-unstoppable.md)\n- [Junie CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/junie-vs-openai-codex.md)\n- [Junie CLI vs Unstoppable](https://www.anchorterminal.com/compare/junie-vs-unstoppable.md)\n- [Kilo Code CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/kilo-code-cli-vs-openai-codex.md)\n- [Kilo Code CLI vs Unstoppable](https://www.anchorterminal.com/compare/kilo-code-cli-vs-unstoppable.md)\n- [Kimi Code CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/kimi-code-cli-vs-openai-codex.md)\n- [Kimi Code CLI vs Unstoppable](https://www.anchorterminal.com/compare/kimi-code-cli-vs-unstoppable.md)\n- [Kiro CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/kiro-cli-vs-openai-codex.md)\n- [Kiro CLI vs Unstoppable](https://www.anchorterminal.com/compare/kiro-cli-vs-unstoppable.md)\n- [mini-swe-agent vs OpenAI Codex](https://www.anchorterminal.com/compare/mini-swe-agent-vs-openai-codex.md)\n- [mini-swe-agent vs Unstoppable](https://www.anchorterminal.com/compare/mini-swe-agent-vs-unstoppable.md)\n- [MiniMax Code vs OpenAI Codex](https://www.anchorterminal.com/compare/minimax-code-vs-openai-codex.md)\n- [MiniMax Code vs Unstoppable](https://www.anchorterminal.com/compare/minimax-code-vs-unstoppable.md)\n- [Mistral Vibe CLI vs OpenAI Codex](https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-openai-codex.md)\n- [Mistral Vibe CLI vs Unstoppable](https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-unstoppable.md)\n- [Muse Code vs OpenAI Codex](https://www.anchorterminal.com/compare/muse-code-vs-openai-codex.md)\n- [Muse Code vs Unstoppable](https://www.anchorterminal.com/compare/muse-code-vs-unstoppable.md)\n- [OpenAI Codex vs OpenCode](https://www.anchorterminal.com/compare/openai-codex-vs-opencode.md)\n- [OpenAI Codex vs OpenHands](https://www.anchorterminal.com/compare/openai-codex-vs-openhands.md)\n- [OpenAI Codex vs Prime Agent](https://www.anchorterminal.com/compare/openai-codex-vs-prime-agent.md)\n- [OpenAI Codex vs Qoder CLI](https://www.anchorterminal.com/compare/openai-codex-vs-qoder-cli.md)\n- [OpenAI Codex vs Qwen Code](https://www.anchorterminal.com/compare/openai-codex-vs-qwen-code.md)\n- [OpenAI Codex vs Mirror CLI](https://www.anchorterminal.com/compare/openai-codex-vs-reflection-mirror.md)\n- [OpenAI Codex vs Rovo Dev CLI](https://www.anchorterminal.com/compare/openai-codex-vs-rovo-dev-cli.md)\n- [OpenAI Codex vs Vibe-Trading](https://www.anchorterminal.com/compare/openai-codex-vs-vibe-trading.md)\n- [OpenAI Codex vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/openai-codex-vs-warp.md)\n- [OpenCode vs Unstoppable](https://www.anchorterminal.com/compare/opencode-vs-unstoppable.md)\n- [OpenHands vs Unstoppable](https://www.anchorterminal.com/compare/openhands-vs-unstoppable.md)\n- [Prime Agent vs Unstoppable](https://www.anchorterminal.com/compare/prime-agent-vs-unstoppable.md)\n- [Qoder CLI vs Unstoppable](https://www.anchorterminal.com/compare/qoder-cli-vs-unstoppable.md)\n- [Qwen Code vs Unstoppable](https://www.anchorterminal.com/compare/qwen-code-vs-unstoppable.md)\n- [Mirror CLI vs Unstoppable](https://www.anchorterminal.com/compare/reflection-mirror-vs-unstoppable.md)\n- [Rovo Dev CLI vs Unstoppable](https://www.anchorterminal.com/compare/rovo-dev-cli-vs-unstoppable.md)\n- [CLI Manager vs Unstoppable](https://www.anchorterminal.com/compare/cli-manager-vs-unstoppable.md)\n- [Harness vs Unstoppable](https://www.anchorterminal.com/compare/harness-autonomous-vs-unstoppable.md)\n- [Paperclip vs Unstoppable](https://www.anchorterminal.com/compare/paperclip-vs-unstoppable.md)\n- [Parallax vs Unstoppable](https://www.anchorterminal.com/compare/parallax-agents-vs-unstoppable.md)\n- [Unstoppable vs Vibe-Trading](https://www.anchorterminal.com/compare/unstoppable-vs-vibe-trading.md)\n- [Unstoppable vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/unstoppable-vs-warp.md)\n",
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