ToolsSeptember 10, 2026via OpenAI Blog
Build more natural voice experiences with GPT‑Live‑1 in the API
Why it matters
A new API-tier voice model with full-duplex capability and telephony support expands what developers can build with conversational AI. This shifts voice from a ChatGPT feature into a primitive for production applications—agents, customer service, accessibility tools.
Key signals
- GPT-Live-1 available in OpenAI API
- Full-duplex voice conversations supported
- Custom voice capability included
- Telephony support enabled
- Stronger instruction following vs. prior versions
- Published September 10, 2026
The hook
OpenAI's GPT-Live-1 brings full-duplex voice to the API—custom voices, telephony, stronger instruction following. Practitioners building voice apps just got a major toolchain upgrade.
GPT‑Live‑1 brings natural, full-duplex voice conversations to the API, with stronger instruction following, custom voices, and telephony support.