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| Comparison | GPT Live 1gpt-live-1 | Choose model 2 |
|---|---|---|
| Type | Live voice | — |
| Best for | Real-time voice agents and phone-style calls | — |
| TokenRex price | $0.00083 per second | — |
| Cached input / 1M tokens | No separate cached rate listed | — |
| Cache write / 1M tokens | Not applicable | — |
| Cached output | Not offered · standard output rate applies | — |
| Market price | $0.00083 per second | — |
| Input token limit (provider) | Within the context window | — |
| Vendor input modalities | Audio | — |
| Vendor output modalities | Audio | — |
| TokenRex endpoints | WebSocket /v1/live | — |
| Benchmarks | ||
| Benchmark evidence | 2 source-linked results | — |
| Tau3 voice tasks (airline/retail/telecom), paired with GPT-6 Astra | 83.6% pass@1 (first attempt) Vendor-reported launch benchmark; GPT-Live-1 delegates reasoning to GPT-6 Astra (medium effort) backend — this is a pipeline score, not GPT-Live-1 in isolation. Compared only against OpenAI's own prior model, not an independent/neutral arena. Published source text: OpenAI's official launch post (mirrored on community forum) states: 'Paired with GPT-6 Astra at medium reasoning effort, GPT-Live-1 completed 83.6% of Tau3 tasks on the first attempt, versus 45.7% for GPT-Realtime-2.1.' OpenAI Developer Community — Introducing GPT-Live-1 in the API | — |
| Full Duplex Bench v1 — turn-taking latency | 0.798seconds (turn-taking latency) Lower is better; vendor-reported, compared only to OpenAI's own previous Realtime model. Published source text: Official launch post: '0.798-second turn-taking latency, compared with 1.41 seconds for GPT-Realtime-2.1.' OpenAI Developer Community — Introducing GPT-Live-1 in the API | — |
No overall score, winner or cost-versus-score frontier is calculated without comparable, attributable benchmark evidence. Different test configurations appear separately. Vendor capabilities are distinct from TokenRex API support.
— means no published value or no matching capability. Provider token limits are not tested gateway guarantees; TokenRex media controls and response formats are listed separately.
GPT Live 1
Sources and verification
Provider specifications describe the upstream model, not a guarantee of every feature through TokenRex. Prices come from the enabled catalog; benchmark results belong to the exact tested model.
- Vendor model documentation
Vendor-reported
Last checked - OpenAI Developer Community — Introducing GPT-Live-1 in the API
Third-party report
Last checked
Research notes (6)
- Full-duplex voice model: listens and speaks simultaneously, with interruption (barge-in), silence and background-noise handling and a native speech transcript.
- Audio-only: no image or video input, no image or video generation, no fine-tuning, no structured outputs.
- Supports function calling and backend model delegation; web/tool use runs through the delegated backend. Reasoning in vendor benchmarks delegates to GPT-6 Astra.
- Connects over WebRTC, WebSocket or SIP; telephony partner integrations include LiveKit, Twilio, Telnyx and Daily/Pipecat.
- Voices: Quartz, Ripple, Vesper, Willow, Stone, Gleam, Meridian, Bossa, Tempo, Beacon, Delta, Cinder; default marin; custom voices supported.
- Official price $0.05/minute billed per second; TokenRex charges 50% (₹2.40/minute). Backend model and tool usage is billed separately.
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