coding
Codex
OpenAI's coding agent, in the ChatGPT app, your terminal, your IDE and the cloud.
openai.com/codex ↗macOS · Windows · Linux · CLI · Web · iOS · Android
what it is
Codex is OpenAI's coding agent. You can use it inside the ChatGPT desktop app, in your terminal with Codex CLI, in your editor with the IDE extension, or run remote tasks in a Codex Cloud environment that you can also start from the web or mobile. Codex shares usage limits with ChatGPT Work.
who it's for
Developers, and ChatGPT subscribers who want an agent that can work on code.
how to start
- 1Make sure you have an eligible ChatGPT plan (or an OpenAI API key for the CLI/IDE).
- 2Install the ChatGPT desktop app (macOS, Windows or Linux), or Codex CLI / the IDE extension.
- 3Sign in with your ChatGPT account.
- 4Open a project and describe the task.
- 5For remote work, create a Codex Cloud environment and start tasks from the web, mobile or desktop.
what you need
- A ChatGPT plan that includes Codex (Plus, Pro, Business, Enterprise) or an OpenAI API key
- macOS, Windows or Linux for the desktop app and CLI
pricing
Included with ChatGPT Plus; Pro plans at $100, $200 or $500/month; Business and Enterprise. With an API key you can use the CLI, SDK and IDE extension but not cloud features.
pricing page ↗checked Oct 10, 2026
key features
- Desktop app, CLI and IDE extension
- Cloud environments for remote tasks
- GitHub code review and Slack (on ChatGPT plans)
- Shares usage with ChatGPT Work
similar agents
- Claude Codesame job
- Cursorsame job
- GitHub Copilotsame job
- Devinsame job
- Clinesame job
- OpenHandssame job