Codex CLI
Codex CLI is an open-source coding agent from OpenAI that runs in a terminal on your computer and helps write and change code in your project. It is for programmers, and it needs a ChatGPT plan or an OpenAI API key to use OpenAI's AI models.
Description written from the project's own page; checked by AI.
Screenshots1
From Codex CLI's own page. Click one to see it full size.
Listed in1
The jobs it does, and the closed apps it replaces
AI coding assistants
Replaces fullyInstead of GitHub Copilot, Cursor, Windsurf, Claude Code, OpenAI Codex app · Terminal only; needs an OpenAI plan or key
What's missing
Things people miss in Codex CLI. Upvote what matters to you; it helps its team decide.
Facts
LicenseApache-2.0
Runs onWindows · Mac · Linux
KindFor developers
Stars on GitHub131k
Hosted onGitHub
ActivityChanged within the last year
Something wrong?
Wrong devices, a wrong description, or it isn't really open source? A mod reviews every suggestion.
What we couldn't confirm2
- Whether the Cursor, Windsurf and Claude Code entries were meant to be replaced, since the README treats Cursor and Windsurf as hosts for the extension.
- Whether it works with the listed closed services without an OpenAI account, since the README mentions both ChatGPT plan sign-in and API key use.