OpenAI Codex CLI

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 are looking for the cloud-based agent from OpenAI, Codex Web, see chatgpt.com/codex.

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Quickstart

Installing and running Codex CLI

Install globally with your preferred package manager:

npm install -g @openai/codex  # Alternatively: `brew install codex`

Then simply run codex to get started:

codex

You can also go to the latest GitHub Release and download the appropriate binary for your platform.

Each GitHub Release contains many executables, but in practice, you likely want one of these:

• macOS
  • Apple Silicon/arm64: codex-aarch64-apple-darwin.tar.gz
  • x86_64 (older Mac hardware): codex-x86_64-apple-darwin.tar.gz
• Linux
  • x86_64: codex-x86_64-unknown-linux-musl.tar.gz
  • arm64: codex-aarch64-unknown-linux-musl.tar.gz

Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.

Using Codex with your ChatGPT plan

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.

Model Context Protocol (MCP)

Codex CLI supports MCP servers. Enable by adding an mcp_servers section to your ~/.codex/config.toml.

Configuration

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

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Docs & FAQ

• 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
• Advanced
  • Non-interactive / CI mode
  • Tracing / verbose logging
  • Model Context Protocol (MCP)
• Zero data retention (ZDR)
• Contributing
• Install & build
  • System Requirements
  • DotSlash
  • Build from source
• FAQ
• Open source fund

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License

This repository is licensed under the Apache-2.0 License.