npm i -g @openai/codex
or brew install codex

Codex CLI is a coding agent from OpenAI that runs locally on your computer.

If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex

Install globally with your preferred package manager. If you use npm:

npm install -g @openai/codex

Alternatively, if you use Homebrew:

brew install codex

Then simply run codex to get started:

codex

Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Team, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.

You can also use Codex with an API key, but this requires additional setup. If you previously used an API key for usage-based billing, see the migration steps. If you're having trouble with login, please comment on this issue.

Codex can access MCP servers. To configure them, refer to the config docs.

Codex CLI supports a rich set of configuration options, with preferences stored in ~/.codex/config.toml. For full configuration options, see Configuration.

• Getting started
  • CLI usage
  • Running with a prompt as input
  • Example prompts
  • Memory with AGENTS.md
  • Configuration
• Sandbox & approvals
• Authentication
  • Auth methods
  • Login on a "Headless" machine
• Automating Codex
  • GitHub Action
  • TypeScript SDK
  • Non-interactive mode (codex exec)
• Advanced
  • Tracing / verbose logging
  • Model Context Protocol (MCP)
• Zero data retention (ZDR)
• Contributing
• Install & build
  • System Requirements
  • DotSlash
  • Build from source
• FAQ
• Open source fund

This repository is licensed under the Apache-2.0 License.