OpenAI releases GPT-Live-1 with full-duplex voice conversations via API

Natural voice interfaces now available to developers, with telephony support and custom voice options.

OpenAI has released GPT-Live-1, a model enabling full-duplex voice conversations through its API. The update includes stronger instruction following, custom voice support, and telephony integration.

Published 2026-09-10 · significance 57 of 100 (medium) · 1 source

What happened

OpenAI has released GPT-Live-1, adding natural, full-duplex voice conversation capabilities to its API. The model supports custom voices, stronger instruction following, and telephony features.

Why it matters

Full-duplex voice conversations lower the barrier for developers building voice-first applications and customer service tools. Telephony support extends GPT's reach into traditional phone systems and legacy enterprise infrastructure.

What changes

Developers can now build voice applications with GPT-Live-1 directly via the API, and integrate with phone networks without custom bridges or workarounds.

Involved

OpenAI

Sources

Build more natural voice experiences with GPT‑Live‑1 in the API — OpenAI

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