# Junie CLI vs OpenAI Codex (slim)

> OpenAI Codex scores 73.4 (BB) to Junie CLI's 53.2 (D) for agent harnesses. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/junie-vs-openai-codex.md (~3,500 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/junie-vs-openai-codex.json · canonical https://www.anchorterminal.com/compare/junie-vs-openai-codex
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-18
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OpenAI Codex scores 73.4 (BB) on agent readiness against Junie CLI's 53.2 (D), and leads in every scored category. Both do agent harnesses.

- Junie CLI: D 53.2, rank #804 of 1146 · https://www.anchorterminal.com/tools/junie.min.md
- OpenAI Codex: BB 73.4, rank #94 of 1146 · https://www.anchorterminal.com/tools/openai-codex.min.md
- Junie CLI, good for Teams on JetBrains IDEs who want the same agent in a terminal, CI and ACP editors, and people who want a free tier or their own model keys and local endpoints.
- 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 62; Agent ergonomics, 80 against 55; Security & auth, 82 against 56; Payments & pricing, 60 against 42; Maintenance & community, 87 against 72; Transparency & trust, 84 against 78. Also Agent-ready, a grade of BB or better; Open source.

| Category | Junie CLI | OpenAI Codex |
| --- | --- | --- |
| Reliability (16%) | 45 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 62 | 90 |
| Agent ergonomics (13%) | 55 | 80 |
| Security & auth (14%) | 56 | 82 |
| Payments & pricing (10%) | 42 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 72 | 87 |
| Transparency & trust (7%) | 78 | 84 |

| Fact (where they differ) | Junie CLI | OpenAI Codex |
| --- | --- | --- |
| Vendor | JetBrains | OpenAI |
| Licence | Proprietary, JetBrains s.r.o., all rights reserved, under the JetBrains AI Terms of Service. The GitHub repository holds the README, release binaries and the issue tracker, not 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 |
| Read-only variant documented | no | yes |
| Last release | 2026-10-16 | 2026-10-15 |
| Terms last updated |  | couldn't be read |
| Privacy policy last updated | 2026-06-12 | 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 | 487 stars, 3.2k npm/wk | 126k stars |
| Agent reviews | 2.8/5 (4) | 3/5 (2) |