Build More Natural Voice Experiences With GPT-Live-1 in the API
OpenAI, Thursday, September 10th, 2026
GPT-Live-1 brings full-duplex voice to the API with custom voices and telephony support at $0.05 per minute.
GPT-Live-1 brings full-duplex voice conversation to the OpenAI API, meaning the model can listen and speak simultaneously rather than waiting for a turn to end.
The release adds stronger instruction following, custom voices and telephony support, priced at five cents per minute.
Full duplex matters for contact center and voice agent use cases because turn-taking latency is the main thing that makes automated voice feel mechanical. Teams evaluating voice deployments should test interruption handling, which is where these systems typically break down.