GPT-Live 1
Launched in ChatGPT 2026-07-08 (GPT-Live-1 for Go/Plus/Pro, GPT-Live-1 mini default for Free); ChatGPT desktop (macOS/Windows) ~2026-07-23; API GA 2026-09-10 per changelog (earlier preview around 2026-07-31). gpt-live-1-mini is ChatGPT-only: not in the API models catalog and developers.openai.com/api/docs/models/gpt-live-1-mini returns 404 (checked 2026-09-29). ChatGPT Voice limits (Unite.AI, 2026-09-23): Free limited mini, Go 3 h mini, Plus 3 h GPT-Live-1, Pro $100 15 h, Pro $200 unlimited; Enterprise/Edu 1.25 credits/min or $0.05/min. Since 2026-09-23 Voice can use plugins/connected apps and runs inside ChatGPT Work. Knowledge cutoff 2025-07-31. Concurrency 25-500 sessions by tier. No image/video input. Not listed on Azure or OpenRouter. OpenAI's launch post returned 403 to our fetcher; ChatGPT facts from TechCrunch.
- Knowledge cutoff
- 2025-07
- Input
- audio, text
- Output
- audio, text
- License
- proprietary
- Pricing
- per minute: $0.05 (per minute of voice session (billed per second); backend model and tools billed separately) source
- Verified
- 2026-09-29
How to call it
| Provider | Model id | Endpoint / URL | Docs |
|---|---|---|---|
| OpenAI API | gpt-live-1 | https://api.openai.com/v1/live/sessions | docs |
| Web app | — | chatgpt.com | — |
Notable capabilities (3)
- Full-duplex voice: Listens and speaks at the same time, delegating reasoning and tool use to a backend agent model. source
- New Live API: Served on a dedicated v1/live/sessions endpoint rather than Realtime. source
- Replaced turn-based Advanced Voice Mode in ChatGPT: Since 2026-07-08 GPT-Live-1 (paid tiers) and GPT-Live-1 mini (default, all users) power ChatGPT Voice, with backchannels ('mhmm') and background hand-off of hard questions to GPT-5.5. source
Natural full-duplex voice assistants that hand hard work to a text model (e.g. gpt-6-sol).
Sources:
- https://developers.openai.com/api/docs/models/gpt-live-1
- https://developers.openai.com/api/docs/changelog
- https://www.unite.ai/openai-brings-plugins-to-live-voice-and-voice-to-work-in-chatgpt/
- https://openai.com/index/introducing-gpt-live/
- https://techcrunch.com/2026/07/08/openai-releases-new-voice-models-for-more-natural-live-conversations/
- Models overview: https://developers.openai.com/api/docs/models
Timeline entry
- OpenAI launches GPT-Live, full-duplex voice models replacing ChatGPT's Advanced Voice Mode ★★★★
On 2026-07-08 OpenAI released GPT-Live-1 and GPT-Live-1 mini, full-duplex voice models that listen and speak at the same time, backchannel ("mhmm") and hand hard questions to GPT-5.5 in the background without pausing the conversation. They replaced turn-based Advanced Voice Mode in ChatGPT (mini…
Other OpenAI models
GPT-6.1 Sol · GPT-6 Luna · GPT-6 Sol · GPT Image 2.5 Flare · GPT Image 2.5 Sunburst · GPT-6 Astra · GPT-Live-Transcribe · GPT-Transcribe · GPT-5.6 Terra · GPT-Realtime-2.1 · GPT-Realtime-2 · GPT-Realtime-Translate · GPT-Rosalind · GPT-Audio-1.5 (and gpt-audio / gpt-audio-mini) · GPT-5.3-Codex · gpt-oss-120b · gpt-oss-20b · GPT-4o mini TTS · text-embedding-3-large · text-embedding-3-small · GPT-5.6 Luna · GPT-5.6 Sol · GPT-Realtime-Whisper · GPT-5.5 Pro · GPT-5.5 · GPT Image 2 · GPT-5.4 · GPT-Realtime-1.5 · GPT-4.1 · GPT-4o · TTS-1 / TTS-1 HD · Whisper large-v3 / large-v3-turbo (open weights) · GPT-Realtime and GPT-Realtime mini · o3 · GPT-4o Transcribe / Mini Transcribe / Transcribe Diarize · Whisper (whisper-1 API) · Sora 2