Build more natural voice experiences with GPT‑Live‑1 in the API
OpenAI releases GPT-Live-1 in the API, a full-duplex voice model that handles interruptions natively and delegates reasoning to backend models.
OpenAI launched GPT-Live-1 in the API, a single-model full-duplex voice system that listens and speaks simultaneously, replacing chained STT-LLM-TTS architectures. It improves Full Duplex Bench performance by 30 percentage points over GPT-Realtime-2.1 and ranks #1 on Tau3 when paired with GPT-6 Astra at medium reasoning effort. Early partner Speak reported nearly 80% fewer interruptions in language tutoring. The API release costs $0.05 per minute for the front-end voice layer and supports telephony, native ASR transcripts, keyword biasing, and expanded voice and language options.
- Single-model full-duplex design removes brittle STT-LLM-TTS handoffs and reduces voice latency.
- Delegates reasoning and tool calls to backend models such as GPT-6 Astra or third-party options.
- +30 percentage points on Full Duplex Bench over GPT-Realtime-2.1; #1 on Tau3 with Astra backend.
- Speak saw almost 80% fewer interruptions in early tutoring evaluations.
- Products
- GPT-Live-1CodexChatGPT
From the original article
4 min read at openai.com
GPT‑Live‑1 brings natural, full-duplex voice conversations to the API, with stronger instruction following, custom voices, and telephony support.
openai.com
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