Sun

Sun is a realtime voice API and multi-speaker voice model built for collaborative voice interaction rather than one-on-one turn taking. Unlike existing realtime voice APIs designed for a single user talking to a single AI, Sun handles group settings — meetings, classrooms, sales calls, multi-agent debates, and brainstorms — with multi-speaker awareness and a 10x context window. Agents respond only when addressed by name with a question, and voice-activity monitoring prevents interrupting active speakers. Positioned as an alternative to ChatGPT Realtime and Gemini Live APIs.