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OpenAI

Codex

One agent for everywhere you code—included in ChatGPT Plus, Pro, Business, Edu, and Enterprise plans.

$ npm i -g @openai/codex
Graphic with a toggle switch labeled “Code review” on a blue gradient background, overlaid with faint lines of code in light green.

Trusted by engineering teams worldwide

Your new coding partner

Switch seamlessly between real-time collaboration and async delegation with Codex in all your tools.

Pair with Codex in your terminal or IDE

Starting from a prompt or spec, Codex navigates your repo to edit files, run commands, and execute tests. Ship new features, fix bugs, brainstorm solutions, or tackle whatever’s next with the Codex CLI and IDE extension—available in VSCode, Cursor, and Windsurf.

Codex interface displaying version and model info (gpt-5), with a command prompt showing “Hey Codex, implement dark mode,” on a blue and purple gradient background with faint code.

Delegate to Codex in the cloud

Codex runs in the background so you can stay in flow and get more done. It runs each task in an isolated sandbox with your repo and environment, generating code you can review, merge, or pull down to your computer to keep working.

Code review interface showing file changes with lines added and removed, and a user response saying “Looks great, add tests!” on a gradient background with faint code.

Code on your phone

Kick off tasks from the ChatGPT mobile app, wherever inspiration strikes. Track progress, review PRs, and merge changes to continue building on the go.

UI element showing test progress for “Support pasting images in composer” with a progress bar labeled “Running tests” and a timer reading 5:43, over a blue and purple gradient background with faint code.

Accelerates your team

Codex plugs into your team’s most important workflows to help you ship faster and more confidently.

GitHub-style code review showing added lines in a Python file with feedback from a bot and a comment saying “@codex sounds good fix it everywhere,” over a purple and blue gradient background with faint code.
Code review in GitHub

Set up Codex to automatically review new PRs and tag @codex to manually request reviews. It compares PR intent with changes, running the code if needed to provide a detailed review.

Learn more(opens in a new window)
Slack thread where Amit Sharma assigns a task to @Codex, which responds by kicking off the task; Lee Hao replies “truly recursive,” on a gradient background with faint code.
Assign tasks from Slack

Codex can answer questions, fix bugs, and explore ideas right from your team’s Slack channels. It automatically pulls context from the conversation to choose the right repo and start working.

Learn more(opens in a new window)
Code snippet in TypeScript using the OpenAI Codex SDK to start a thread, run tasks with prompts, and log results, shown on a gradient background with faint code.
Codex SDK

Embed Codex in GitHub Actions and internal tools to automate key engineering processes like CI/CD, code maintenance, and issue management so your team stays focused on shipping.

Learn more(opens in a new window)

More resources

Codex is included in ChatGPT Plus, Pro, Business, Edu, and Enterprise. Get the most out of it with these guides.

FAQ

Codex CLI, IDE extension, and Codex web all allow you to sign in with ChatGPT if you have a Plus, Pro, Business, Edu, or Enterprise plan. Business and Enterprise admins can learn more about enabling Codex for their workspace here⁠(opens in a new window).

Try Codex

$ npm i -g @openai/codex