Codex

One agent for everywhere you code. Powered by OpenAI’s frontier coding models and included in ChatGPT Plus, Pro, Business, Enterprise, and Edu.

$ npm i -g @openai/codex

Trusted by engineering teams worldwide

Your new coding teammate

Collaborate in real-time, delegate entire tasks end-to-end, and integrate Codex directly into core engineering workflows to accelerate your entire team.

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.

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 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.

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.

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.

Pair with Codex in your IDE or terminal

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.

Code review

Delegate to Codex in the cloud

Works where your team does

Codex SDK

Helps at every step of software development

Codex can understand complex codebases, plan and implement new features, debug difficult issues, and provide high-signal code reviews to help you ship faster and with more confidence.

Pulls the right context from your codebase to clarify dependencies, gaps, and risks, helping your team plan faster by focusing on prioritization instead of hunting for context.

What engineers love about Codex

“Codex caught a real active bug that other code review tools missed. It clearly puts thought into reviews and finds complex issues. Precision and value are high per caught bug and I’m actually pretty impressed!”

Austin Ray, AI Dev X Team Lead at Ramp