OpenAI Codex CLI

OpenAI's open-source terminal coding agent. Runs locally, executes code, and edits files with user approval.

ProvisionalEarly evidence

Early verdict — controlled benchmark pending

The score on this page is a provisional research-based estimate. No controlled benchmark suite has been completed for OpenAI Codex CLI yet, so this verdict cannot be cited as final proof and OpenAI Codex CLI is not eligible for "Verdict Certified" status. When a verified run lands, it will appear in the Evidence Timeline below and the status badge above will switch to "Verified".

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Verdict

Capable terminal-first agent in active development. Reputation-based placeholder verdict.

Best for

✓Engineers who prefer the terminal
✓Bring-your-own-key users
✓Scriptable / pipe-friendly workflows

Not ideal for

✕Non-technical operators
✕Teams that want a managed platform

Failure modes we'd watch

⚠Feature surface area moves quickly — version drift
⚠Confirmation prompts can be missed in long sessions

Evidence Timeline

No controlled benchmark runs published yet for OpenAI Codex CLI. The score above is a provisional estimate pending the first run. New runs land on the runs page.

Needs verification

The following fields are flagged for verification before we publish a non-provisional verdict:

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