Codex

OpenAI's coding agent for your terminal: it reads your project, runs commands and edits files, and comes with ChatGPT plans.

Verdict
Use now
The job
Client audits and builds
Last checked

It does the same kind of work as Claude Code, in the same folder and reading the same AGENTS.md, so members pick by the plan they already pay for. Its sandbox keeps edits inside the project folder by default, which suits client work.