Learn | OpenAI Developers
For the complete documentation index, see llms.txt. Markdown versions of documentation pages are available by appending .md to the page URL.
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Learning tracks

Building agents

Building agents

Learn how to build agents: Foundational concepts to practical implementation

AI app development: Concept to production

AI app development: Concept to production

Build, deploy, and optimize AI apps.

Model optimization

Model optimization

Fine-tune, distill, and optimize models for the best performance and cost.

Demo apps

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ChatKit starter app

ChatKit starter app

Integrate ChatKit with an Agent Builder workflow in your application.

code
Plugin UI examples

Plugin UI examples

Example UI and corresponding MCP servers for ChatGPT plugins.

code
Responses starter app

Responses starter app

Starter application demonstrating OpenAI Responses API with tools.

code

Videos

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Codex for (almost) everything

Codex for (almost) everything

See the latest Codex app updates for working across more of the software development lifecycle.

video
Codex code review

Codex code review

Walkthrough of how Codex drives end-to-end pull request reviews with the new onboarding flow.

video
Introducing the Codex app

Introducing the Codex app

See the Codex app in action and how it helps you build and ship faster.

video