overview.md Codex Docs, 2026-03-23 18:22 UTC → 2026-05-13 00:57 UTC

1# Codex

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3![Codex app showing a project sidebar, thread list, and review pane](/images/codex/app/codex-app-basic-light.webp)

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5Codex is OpenAI’s coding agent for software development. ChatGPT Plus, Pro, Business, Edu, and Enterprise plans include Codex. It can help you:

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7- **Write code**: Describe what you want to build, and Codex generates code that matches your intent, adapting to your existing project structure and conventions.

8- **Understand unfamiliar codebases**: Codex can read and explain complex or legacy code, helping you grasp how teams organize systems.

9- **Review code**: Codex analyzes code to identify potential bugs, logic errors, and unhandled edge cases.

10- **Debug and fix problems**: When something breaks, Codex helps trace failures, diagnose root causes, and suggest targeted fixes.

11- **Automate development tasks**: Codex can run repetitive workflows such as refactoring, testing, migrations, and setup tasks so you can focus on higher-level engineering work.

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13[Get started with Codex](https://developers.openai.com/codex/quickstart)

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15[### Quickstart

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17Download and start building with Codex.

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19 Get started](https://developers.openai.com/codex/quickstart) [### Explore

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21Get inspirations on what you can build with Codex.

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23 Learn more](https://developers.openai.com/codex/explore) [### Community

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25Read community posts, explore meetups, and connect with Codex builders.

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27 See community](/community) [### Codex for Open Source

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29Apply or nominate maintainers for API credits, ChatGPT Pro with Codex, and selective Codex Security access.

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31 Learn more](https://developers.openai.com/community/codex-for-oss)