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Codex app

The Codex app is a focused desktop experience for working on Codex threads in parallel, with built-in worktree support, automations, and Git functionality.

ChatGPT Plus, Pro, Business, Edu, and Enterprise plans include Codex. Learn more about what's included.

Getting started

The Codex app is available on macOS and Windows.

Most Codex app features are available on both platforms. Platform-specific exceptions are noted in the relevant docs.

1. Download and install the Codex app 
Download the Codex app for macOS or Windows. Choose the Intel build if you're using an Intel-based Mac.

<CodexAppDownloadCta client:load className="mb-4" />

<div class="text-sm">
  [Get notified for Linux](https://openai.com/form/codex-app/)
</div>

  1. Open Codex and sign in

    Once you downloaded and installed the Codex app, open it and sign in with your ChatGPT account or an OpenAI API key.

    If you sign in with an OpenAI API key, some functionality such as cloud threads might not be available.

  2. Select a project

    Choose a project folder that you want Codex to work in.

If you used the Codex app, CLI, or IDE Extension before you'll see past projects that you worked on.

  1. Send your first message

    After choosing the project, make sure Local is selected to have Codex work on your machine and send your first message to Codex.

    You can ask Codex anything about the project or your computer in general. Here are some examples:

    If you need more inspiration, explore Codex use cases. If you're new to Codex, read the best practices guide.

Work with the Codex app

Multitask across projects

Run project threads side by side and switch between them quickly.

Worktrees

Keep parallel code changes isolated with built-in Git worktree support.

Computer use

Let Codex use macOS apps for GUI tasks, browser flows, and native app testing.

Review and ship changes

Inspect diffs, address PR feedback, stage files, commit, and push.

Terminal and actions

Run commands in each thread and launch repeatable project actions.

In-app browser

Open rendered pages, leave comments, or let Codex operate local browser flows.

Image generation

Generate or edit images in a thread while you work on the surrounding code and assets.

Automations

Schedule recurring tasks, or wake up the same thread for ongoing checks.

Skills

Reuse instructions and workflows across the app, CLI, and IDE Extension.

Follow plans, sources, task summaries, and generated file previews.

Plugins

Connect apps, skills, and MCP servers to extend what Codex can do.

IDE Extension sync

Share Auto Context and active threads across app and IDE sessions.

Need help? Visit the troubleshooting guide.