AI-powered coding agent for faster, higher-quality development.
Start building with Codex
Codex works as a coding agent that can complete well-scoped tasks in secure, isolated environments, with progress you can monitor in real time all from plain-language prompts. Whether you’re prototyping an idea, optimizing a system, or debugging a tricky issue, Codex integrates into your workflow to help you build and ship more efficiently.
Why it matters for builders
Code generation from natural language: Quickly scaffold projects, add features, or generate boilerplate code.
Code understanding: Get clear explanations for complex logic and dependencies.
Refactoring & optimization: Improve efficiency and maintainability without altering intended behavior.
Multi-language support: Works across popular programming languages, frameworks, and libraries.
Automating repetitive tasks: Offload well-scoped engineering work like refactoring, renaming, and writing tests to stay focused on higher-value work.
Core resources
Codex Overview & Tips: Public documentation with capabilities, usage tips, and an overview video.
How OpenAI Uses Codex: OpenAI's best-practice guide on prompting for Codex, with examples from real workflows (PDF below).
Get started today
Review the Codex Overview to understand what it can do and how to integrate it.
Read the How OpenAI Uses Codex guide for practical prompting strategies and examples.
Apply these techniques in your environment to generate, refactor, and understand code more effectively.
