How we built a realtime system for responsive voice AI in six months

OpenAI developed GPT-Live, a third-generation voice system, to enhance real-time voice AI responsiveness. Unlike previous turn-based systems that used turn detectors and often caused delays or interruptions, GPT-Live employs a full-duplex voice model, allowing it to listen and speak simultaneously. This eliminates the need for a separate detector, making conversations more natural and immediate. It can also consult frontier models like GPT-5.5 for deeper reasoning without disrupting the conversational flow, achieving an unprecedented combination of responsiveness and intelligence.