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OpenAI DevDay 2026 is our biggest yet, with more than 20 major announcements across ChatGPT, Codex, our models, and entirely new forms of working with AI. We believe AI can help bring about a new renaissance of creativity and discovery. It should give people more time for what matters to them, more freedom to pursue their ideas, and the ability to do things they didn’t think were possible. Today, we introduced agents that can take on ongoing responsibilities and new ways for people and AI to work together. We also expanded our commitment to an open ecosystem by opening up ChatGPT as a shared surface where humans and agents can collaborate and where developers can directly launch new native experiences to our collective 1.2B weekly users. Here’s everything we announced. A whole new way to work with AI New tools for developers in Codex & the API More customization in ChatGPT with plugins Improving how people and AI work together Do more with your ChatGPT subscription Keep reading View all Introducing dots ProductSep 29, 2026 How we will do better for Australia CompanySep 28, 2026 Lenfest grows landmark program with OpenAI support CompanySep 28, 2026