CLI agentCloud agent
Codex
OpenAI
Codex is OpenAI's coding agent. The CLI works in a local repo, and ChatGPT includes a cloud version on paid plans. You bring a task and it edits code and can run commands. Confirm which plan includes it on openai.com.
7.8
Preliminary
Editorial score out of 10. Not a benchmark.
What we tried
Used the CLI on a small repo and asked it to add a typed helper and show the diff. It edited the file. First impression only.
Scores are preliminary editorial notes from a short hands-on pass. They are not benchmark results, not pass rates, and not for sale. A shared task suite is not published yet, so we do not print speed, cost, or success-rate figures.
Preliminary notes
- Setup7/10
- Editing8/10
- Agent work8/10
- Docs and control7/10
Good fit
- People already on a paid ChatGPT plan
- Terminal-first work next to Claude Code or Aider
Limits
- The useful tiers are paid
- Cloud and CLI are different products; check which one your plan includes