Happy

Happy is an open-source platform that allows users to orchestrate and manage multiple AI models (such as Claude, Codex, Grok, Astra, and Fable) within a single, collaborative session. It enables real-time switching between models, secure seamless mobile and terminal access, reuse of existing model subscriptions, and multiplayer agent collaboration. Happy is ideal for developers, technical teams, and power users seeking flexibility, privacy, and open infrastructure for AI workflows.