Codex use cases
Learn how teams are using Codex to automate tasks, build apps and ship with confidence.
OpenAI for developers
Docs and resources to help you build with, for, and on OpenAI.
New: GPT-5.5 for coding and professional work
Our most capable model yet for coding, reasoning, and professional tasks.
API Platform
Use our APIs and models to build your own AI experiences.
Codex
Build and ship faster with our coding agent — everywhere you work.
Apps SDK
Extend ChatGPT with your apps built on top of the Model Context Protocol.
Showcase
Discover what builders are creating with Codex and the OpenAI API, and build your own version.
Featured
GPT Image 2 for image generation and editing
Generate and edit images with stronger instruction following, flexible sizes, and high-fidelity image inputs.
Codex for (almost) everything
April 16, 2026
Blog posts
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Using skills to accelerate OSS maintenance
Using skills and GitHub Actions to optimize Codex workflows in the OpenAI Agents SDK repos.
Mar 9, 2026 Codex
Testing Agent Skills Systematically with Evals
A practical guide to turning agent skills into something you can test, score, and improve over time.
Jan 22, 2026 Codex
Run long horizon tasks with Codex
Feb 23, 2026 Codex
