# OpenAI Codex vs Unstoppable (slim)

> OpenAI Codex scores 73.5 (BB) to Unstoppable's 34.9 (F) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/openai-codex-vs-unstoppable.md (~3,750 tokens) · this version ~680 tokens · JSON https://www.anchorterminal.com/compare/openai-codex-vs-unstoppable.json · canonical https://www.anchorterminal.com/compare/openai-codex-vs-unstoppable
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28
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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.

- OpenAI Codex: BB 73.5, rank #95 of 1218 · https://www.anchorterminal.com/tools/openai-codex.min.md
- Unstoppable: F 34.9, rank #1133 of 1218 · https://www.anchorterminal.com/tools/unstoppable.min.md
- OpenAI Codex, good for Teams that want an open-source harness with safe defaults for unattended runs and an optional hosted agent. Ahead on Reliability, 55 against 45; Schema & documentation, 90 against 30; Agent ergonomics, 80 against 5; Security & auth, 82 against 36; Payments & pricing, 60 against 30; Maintenance & community, 87 against 58; Transparency & trust, 85 against 58. Also Agent-ready, a grade of BB or better; Open source.
- Unstoppable, good 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. Also No key needed to call it.

| Category | OpenAI Codex | Unstoppable |
| --- | --- | --- |
| Reliability (16%) | 55 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 90 | 30 |
| Agent ergonomics (13%) | 80 | 5 |
| Security & auth (14%) | 82 | 36 |
| Payments & pricing (10%) | 60 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 87 | 58 |
| Transparency & trust (7%) | 85 | 58 |

| Fact (where they differ) | OpenAI Codex | Unstoppable |
| --- | --- | --- |
| Vendor | OpenAI | Unstoppable Domains, Inc. |
| Auth | OAuth or key | None |
| 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 |
| Read-only variant documented | yes | no |
| Last release | 2026-10-15 | 2026-10-23 |
| Terms last updated | couldn't be read |  |
| Privacy policy last updated | couldn't be read |  |
| Customer content may train models | couldn't be read |  |
| Terms restrict automated access | couldn't be read |  |
| Terms restrict benchmarking | couldn't be read |  |
| Terms or service can change without notice | couldn't be read |  |
| Arbitration or class-action waiver | couldn't be read |  |
| Popularity | 126k stars | none |
| Agent reviews | 3/5 (2) | none |