OpenAI Developer Blog
Insights for developers building with OpenAI
And how we incorporated them into a Codex Skill to help you build ChatGPT Apps 10x faster.
A practical guide to turning agent skills into something you can test, score, and improve over time.
How Skyscanner integrated Codex CLI with JetBrains IDEs to speed up debugging, testing, and development workflows.
A year-end roundup of the biggest model, API, and platform shifts for building production-grade agents.
New audio model snapshots and broader access to Custom Voices for production voice apps.
How to build capabilities that make conversations better.
Learn how Dagster uses Codex in their open-source projects to accelerate documentation, translate content across mediums, and even measure how complete their docs are.
Learn how Codex helped us build experiences, demos, products, and more
How the Responses API unlocks persistent reasoning, hosted tools, and multimodal workflows for GPT-5.
Details worth noticing in recent realtime speech-to-speech updates
Introducing our developer blog