{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/gpt-live-1/","md":"https://postcutoff.com/m/gpt-live-1/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"gpt-live-1","name":"GPT-Live 1","org":"OpenAI","family":"GPT Live","released":"2026-07-08","status":"current","type":"audio/speech","modality_in":["audio","text"],"modality_out":["audio","text"],"open_weights":false,"model_license":"proprietary","context_window":null,"max_output":null,"knowledge_cutoff":"2025-07","pricing":{"per_minute":0.05,"unit":"per minute of voice session (billed per second); backend model and tools billed separately","source":"https://developers.openai.com/api/docs/models/gpt-live-1"},"price_line":"$0.05 per minute","access":[{"provider":"OpenAI API","model_id":"gpt-live-1","endpoint":"https://api.openai.com/v1/live/sessions","docs":"https://developers.openai.com/api/docs/models/gpt-live-1"},{"provider":"Web app","url":"https://chatgpt.com"}],"capabilities":[{"name":"Full-duplex voice","detail":"Listens and speaks at the same time, delegating reasoning and tool use to a backend agent model.","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-live-1"},{"name":"New Live API","detail":"Served on a dedicated v1/live/sessions endpoint rather than Realtime.","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-live-1"},{"name":"Replaced turn-based Advanced Voice Mode in ChatGPT","detail":"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.","first":false,"discovered":"launch","source":"https://techcrunch.com/2026/07/08/openai-releases-new-voice-models-for-more-natural-live-conversations/"}],"entry":"2026-07-08-openai-gpt-live-chatgpt-voice","notes":"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. Since 2026-10-15 ChatGPT Voice is moving to GPT-Live-1.1 (and GPT-Live-1.1 Quip in place of GPT-Live-1 mini), rolling out gradually; gpt-live-1 remains the API model until GPT-Live-1.1 reaches the API (\"coming soon\", checked 2026-10-16). OpenAI's launch post returned 403 to our fetcher; ChatGPT facts from TechCrunch.","verified":"2026-10-16","body_md":"Natural full-duplex voice assistants that hand hard work to a text model (e.g. gpt-6-sol).\n\nSources:\n- https://developers.openai.com/api/docs/models/gpt-live-1\n- https://developers.openai.com/api/docs/changelog\n- https://www.unite.ai/openai-brings-plugins-to-live-voice-and-voice-to-work-in-chatgpt/\n- https://openai.com/index/introducing-gpt-live/\n- https://techcrunch.com/2026/07/08/openai-releases-new-voice-models-for-more-natural-live-conversations/\n- Models overview: https://developers.openai.com/api/docs/models\n- GPT-Live-1.1 announcement (2026-10-15): https://x.com/OpenAI/status/2110797830361436604","page_url":"https://postcutoff.com/m/gpt-live-1/","standing":{"kind":"speech and audio","newer_count":45,"newer":[{"id":"nemotron-3-5-transcribe","name":"NVIDIA Nemotron 3.5 Transcribe (30B-A4B)","org":"NVIDIA","released":"2026-10-28","page_url":"https://postcutoff.com/m/nemotron-3-5-transcribe/"},{"id":"hy-simulmt-30b-a3b","name":"Hy-SimulMT-30B-A3B","org":"Tencent","released":"2026-10-22","page_url":"https://postcutoff.com/m/hy-simulmt-30b-a3b/"},{"id":"eleven-realtime-v1-max","name":"Eleven Realtime v1 Max / Mini","org":"ElevenLabs","released":"2026-10-20","page_url":"https://postcutoff.com/m/eleven-realtime-v1-max/"},{"id":"voxtral-mini-transcribe-3","name":"Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)","org":"Mistral AI","released":"2026-10-20","page_url":"https://postcutoff.com/m/voxtral-mini-transcribe-3/"},{"id":"voxtral-small-transcribe-3","name":"Voxtral Small Transcribe 3","org":"Mistral AI","released":"2026-10-20","page_url":"https://postcutoff.com/m/voxtral-small-transcribe-3/"}],"before":{"id":"gpt-realtime-2-1","name":"GPT-Realtime-2.1","org":"OpenAI","released":"2026-07-06","page_url":"https://postcutoff.com/m/gpt-realtime-2-1/"},"after":{"id":"gpt-transcribe","name":"GPT-Transcribe","org":"OpenAI","released":"2026-07-28","page_url":"https://postcutoff.com/m/gpt-transcribe/"},"weights":"closed","licence":"proprietary","licence_permissive":false,"summary":"Closed weights; access is hosted only."}}