OpenAI DevDay 2026 introduces major platform updates alongside staggering growth figures. The event showcases new APIs like Decisions and Agents, new developer environments including Spaces and Marketplace, and highlights a milestone of 1.2 billion weekly active users on ChatGPT. These releases give AI developers powerful new primitives for building complex agentic workflows and deploying production-grade applications directly into the OpenAI ecosystem.
Opening Kapyn…