OpenAI Codex

Cloud software agent that works in an isolated sandbox and hands back a pull request.

Included in paid ChatGPT plans; usage limits vary by tier Verified 2026-11-09 agentcloudcoding

Use it for

Delegating a scoped ticket — write the test, fix the bug — and reviewing the diff later

Skip it if

Anything needing your local toolchain, credentials, or a service only your laptop can reach

A remote coding agent that runs in a sandbox with a checked-out repository, executes tests, and returns a branch or pull request. Because it does not see your machine, the failure mode is environmental rather than logical: it will pass its own tests and still disagree with your CI. Best treated as a teammate working from a written ticket.

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