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Agent IDE — Codex fork for AI-native development environment
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chore(ci): Speed up macOS builds by using larger runner (#5234) 
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.devcontainer chore: install an extension for TOML syntax highlighting in the devcontainer (#1650) 2025-07-22 10:58:09 -07:00
.github chore(ci): Speed up macOS builds by using larger runner (#5234) 2025-10-20 23:47:38 +00:00
.vscode Move rust analyzer target dir (#5328) 2025-10-18 17:31:46 -07:00
codex-cli detect Bun installs in CLI update banner (#5074) 2025-10-14 17:49:44 +00:00
codex-rs [MCP] Dedicated error message for GitHub MCPs missing a personal access token (#5393) 2025-10-20 16:23:26 -07:00
docs docs: correct getting-started behaviors (#5407) 2025-10-20 16:17:07 -07:00
scripts chore: introduce publishing logic for @openai/codex-sdk (#4543) 2025-10-01 08:29:59 -07:00
sdk/typescript feat: add images support to the Codex Typescript SDK (#5281) 2025-10-20 09:54:59 -07:00
.codespellignore feat: make it possible to toggle mouse mode in the Rust TUI (#971) 2025-05-16 16:16:50 -07:00
.codespellrc TypeScript SDK scaffold (#4455) 2025-09-29 13:27:13 -07:00
.gitignore feat: agent override file (#5215) 2025-10-15 17:46:01 +01:00
.npmrc chore: migrate to pnpm for improved monorepo management (#287) 2025-04-18 16:25:15 -07:00
.prettierignore [apply-patch] Clean up apply-patch tool definitions (#2539) 2025-08-21 20:07:41 -07:00
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cliff.toml docs(changelog): update install command to @openai/codex@<version> (#2073) 2025-10-18 11:02:22 -07:00
flake.lock Fix nix build (#4048) 2025-10-17 12:19:08 -07:00
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package.json chore: subject docs/*.md to Prettier checks (#4645) 2025-10-03 11:35:48 -07:00
pnpm-lock.yaml Add structured-output support (#4793) 2025-10-05 18:17:50 -07:00
pnpm-workspace.yaml TypeScript SDK scaffold (#4455) 2025-09-29 13:27:13 -07:00
PNPM.md fix: include pnpm lock file (#377) 2025-04-18 17:01:11 -07:00
README.md Update Homebrew install instructions to use cask (#5377) 2025-10-20 17:43:40 +00:00

README.md

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

Codex CLI splash

Quickstart

Installing and running Codex CLI

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

npm install -g @openai/codex

Alternatively, if you use Homebrew:

brew install --cask 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

Codex CLI login

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

Configuration

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

Docs & FAQ

License

This repository is licensed under the Apache-2.0 License.