OpenAI DevDay 2026: ChatGPT Becomes a Collaboration Platform with Spaces, Marketplace, and a New Agents API

Beyond GPT-6.1 Sol and dots, OpenAI used DevDay 2026 to ship a wave of platform features: an Agents API with computer use, Codex Cloud Environments and CLI, ChatGPT Spaces and collaborative Pages, Slack/Teams integration, an OpenAI Marketplace with 16 launch partners, and Sign in with ChatGPT.