codex.md Codex Docs, 2026-04-16 18:31 UTC → 2026-05-12 01:59 UTC

1# Codex1# 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)3<div class="flex flex-col-reverse gap-8 lg:flex-row-reverse">

4 <div class="w-full lg:w-1/2">

5 <CodexScreenshot

6 alt="Codex app showing a project sidebar, thread list, and review pane"

7 lightSrc="/images/codex/app/codex-app-basic-light.webp"

8 darkSrc="/images/codex/app/codex-app-basic-dark.webp"

9 maxHeight="400px"

10 variant="no-wallpaper"

11 />

12 </div>

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14 <div class="w-full lg:w-1/2">

5Codex is OpenAI's coding agent for software development. ChatGPT Plus, Pro, Business, Edu, and Enterprise plans include Codex. It can help you:15Codex 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.17- **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.19- **Understand unfamiliar codebases**: Codex can read and explain complex or legacy code, helping you grasp how teams organize systems.

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

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21Get inspiration on what you can build with Codex.21- **Review code**: Codex analyzes code to identify potential bugs, logic errors, and unhandled edge cases.

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23 Learn more](https://developers.openai.com/codex/use-cases) [### Community23- **Debug and fix problems**: When something breaks, Codex helps trace failures, diagnose root causes, and suggest targeted fixes.

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25Read community posts, explore meetups, and connect with Codex builders.25- **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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27 See community](/community) [### Codex for Open Source27<CtaPillLink

28 href="/codex/quickstart"

29 label="Get started with Codex"

30 class="mt-10"

31/>

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29Apply or nominate maintainers for API credits, ChatGPT Pro with Codex, and selective Codex Security access.33 </div>

34</div>

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31 Learn more](https://developers.openai.com/community/codex-for-oss)36<div class="not-prose mt-10 grid grid-cols-1 gap-6 md:grid-cols-2 lg:grid-cols-3">

37 <LinkCard

38 title="Quickstart"

39 href="/codex/quickstart"

40 description="Download and start building with Codex."

41 variant="image"

42 ctaLabel="Get started"

43 backgroundImage="/images/codex/codex-wallpaper-3.webp"

44 />

45 <LinkCard

46 title="Explore use cases"

47 href="/codex/use-cases"

48 description="Get inspiration on what you can build with Codex."

49 variant="image"

50 ctaLabel="Learn more"

51 backgroundImage="/images/codex/codex-wallpaper-1.webp"

52 />

53 <LinkCard

54 title="Community"

55 href="/community"

56 description="Read community posts, explore meetups, and connect with Codex builders."

57 variant="image"

58 ctaLabel="See community"

59 backgroundImage="/images/codex/codex-wallpaper-2.webp"

60 />

61 <LinkCard

62 title="Codex for Open Source"

63 href="/community/codex-for-oss"

64 description="Apply or nominate maintainers for API credits, ChatGPT Pro with Codex, and selective Codex Security access."

65 variant="image"

66 ctaLabel="Learn more"

67 backgroundImage="/images/codex/codex_bg.webp"

68 />

69</div>