LiveKit adds OpenAI GPT-Live: full-duplex voice model that listens and speaks at once
OpenAIDevs · x · 2026-09-11
LiveKit Agents now supports OpenAI's full-duplex voice model GPT-Live via a new GPTLiveModel plugin, reusing the same AgentSession API.
Key traits:
- Full-duplex: listens and speaks simultaneously, deciding its own turn boundaries
- Server-driven: no client events create/cancel/truncate responses; the model controls turns
- Model-controlled barge-in: the framework can stop playback, but the model keeps talking until it stops itself
- Delegated reasoning: a backend Responses model handles reasoning and tool calls so slow lookups don't leave dead air
- Append-only context: preload conversations; supports turns, transcripts, and agent handoff
The plugin guide covers setup, auth, parameters, tools, delegation, and pricing for Python and Node.js.
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