OpenAI details GPT-Live full-duplex realtime voice system
OpenAI published how it built GPT-Live, its third-generation voice system, in about six months. The system removes the turn detector from the audio path so the model can listen and speak at once, and can call frontier models such as GPT-5.5 for deeper reasoning or tools without breaking the conversation.
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Original reporting: How we built a realtime system for responsive voice AI in six months