{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2026-07-08-openai-gpt-live-chatgpt-voice/","md":"https://postcutoff.com/e/2026-07-08-openai-gpt-live-chatgpt-voice/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":"2026-07-08-openai-gpt-live-chatgpt-voice","date":"2026-07-08","date_precision":"day","short_title":"OpenAI launches GPT-Live, full-duplex voice models replacing ChatGPT's Advanced Voice Mode","deck":null,"takeaway":"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.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"OpenAI - Introducing GPT-Live","url":"https://openai.com/index/introducing-gpt-live/","type":"official","group":"primary","domain":"openai.com"},{"n":2,"title":"gpt-live-1 model page","url":"https://developers.openai.com/api/docs/models/gpt-live-1","type":"docs","group":"primary","domain":"developers.openai.com"},{"n":3,"title":"OpenAI API changelog (GPT-Live 1 GA, 2026-09-10)","url":"https://developers.openai.com/api/docs/changelog","type":"docs","group":"primary","domain":"developers.openai.com"},{"n":4,"title":"OpenAI: Build more natural voice experiences with GPT-Live-1 in the API (Sept 10)","url":"https://openai.com/index/introducing-gpt-live-1-in-the-api/","type":"official","group":"primary","domain":"openai.com"},{"n":5,"title":"TechCrunch - OpenAI releases new voice models for more natural live conversations","url":"https://techcrunch.com/2026/07/08/openai-releases-new-voice-models-for-more-natural-live-conversations/","type":"press","group":"press","domain":"techcrunch.com"},{"n":6,"title":"Pondero - GPT-Live comes to ChatGPT desktop","url":"https://pondero.ai/news/2026-07-25-gpt-live-chatgpt-desktop/","type":"press","group":"press","domain":"pondero.ai"},{"n":7,"title":"Simon Willison on X - ChatGPT voice mode reports an April 2024 cutoff","url":"https://x.com/simonw/status/2042630738542203057","type":"discussion","group":"reactions","domain":"x.com"},{"n":8,"title":"Simon Willison - ChatGPT voice mode is a weaker model (2026-04-10)","url":"https://simonwillison.net/2026/apr/10/voice-mode-is-weaker/","type":"discussion","group":"reactions","domain":"simonwillison.net"}],"official":4,"filed":"2026-09-29","updated":"2026-10-16","orgs":["OpenAI"],"title":"OpenAI launches GPT-Live, full-duplex voice models replacing ChatGPT's Advanced Voice Mode","summary":"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 as default for everyone, GPT-Live-1 for paid tiers); the gpt-live-1 API went GA on 2026-09-10 at $0.05 per minute.","key_facts":["GPT-Live-1 default for ChatGPT Go/Plus/Pro; GPT-Live-1 mini default for Free users; iOS, Android and web","Full-duplex: can be interrupted naturally, gives backchannels, stays quiet while the user thinks","Delegates search, reasoning and agentic tasks to GPT-5.5 while the conversation continues","OpenAI says 150M+ people use ChatGPT voice features (TechCrunch)","ChatGPT desktop (macOS/Windows) got GPT-Live around 2026-07-23; voice plugins (email, calendar, Slack) followed 2026-09-23, together with Voice inside ChatGPT Work (press; see 2026-09-23-chatgpt-voice-plugins-work)","API: gpt-live-1 on new v1/live/sessions endpoint, GA 2026-09-10, $0.05/min billed per second plus backend model","Before GPT-Live, ChatGPT voice mode ran on a GPT-4o-era model: on 2026-04-10 Simon Willison noted it reported an April 2024 knowledge cutoff, so text and voice in the same subscription had different knowledge (see docs/cutoff-blindness case 017)","Oct 15, 2026: succeeded in ChatGPT, Codex and dots by GPT-Live-1.1 (new voices in six languages, better accents; API coming soon), see 2026-10-15-openai-gpt-live-1-1-voice-update","Sept 10, 2026: GPT-Live-1 launched in the API: full-duplex interruption handling in one model (no STT-LLM-TTS chain), delegation of reasoning and tool calls to a backend text model such as GPT-6 Astra or a third-party model, style control via system prompt, background-noise and silence handling, long-session reliability, and telephony support; Speak reported almost 80% fewer interruptions of learners vs. its previous turn-based setup"],"key_numbers":[],"tags":["voice","speech","full-duplex","chatgpt","realtime"],"science":null,"body_md":"## What happened\n\nOpenAI replaced the voice stack in ChatGPT with a new model family built for simultaneous listening and speaking. Instead of\nwaiting for the user to finish a turn, GPT-Live tracks the conversation continuously and offloads heavy reasoning or tool use\nto a text model (GPT-5.5 at launch) while it keeps talking.\n\n## Why it matters\n\nChatGPT's default voice experience moved to a full-duplex model with a separate \"thinker\" behind it, narrowing the gap\nbetween natural conversation and capable agents for one of the largest voice-assistant user bases. Rivals followed: Anthropic moved Claude's voice mode to\nOpus/Sonnet (2026-07-23) and Google shipped Gemini 3.8 Live (2026-09-15).\n\nOpenAI's own post could not be fetched by our tools; details are from TechCrunch and the API docs.","disputed":[],"related":[{"id":"2026-10-15-openai-gpt-live-1-1-voice-update","url":"https://postcutoff.com/e/2026-10-15-openai-gpt-live-1-1-voice-update/","date":"2026-10-15","date_precision":"day","short_title":"OpenAI ships GPT-Live-1.1","deck":"New voices in six languages, better accents and less \"checking...\" in ChatGPT, Codex and dots","takeaway":null,"category":"model-release","category_label":"Model releases","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":10,"official":2,"filed":"2026-10-16","updated":"2026-11-12","orgs":["OpenAI"]},{"id":"2026-09-23-chatgpt-voice-plugins-work","url":"https://postcutoff.com/e/2026-09-23-chatgpt-voice-plugins-work/","date":"2026-09-23","date_precision":"day","short_title":"ChatGPT Voice gets plugins and moves into ChatGPT Work","deck":"Spoken requests can now drive agent tasks","takeaway":"Voice stopped being a chat-only mode in the largest consumer assistant and became a way to start agent work.","category":"product","category_label":"Products","importance":2,"confidence":"medium","status":{"key":"partly","labels":["Partly confirmed"]},"sources":5,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]},{"id":"2026-07-09-chatgpt-work","url":"https://postcutoff.com/e/2026-07-09-chatgpt-work/","date":"2026-07-09","date_precision":"day","short_title":"OpenAI launches ChatGPT Work, a long-running agent for office work","deck":null,"takeaway":"Marks OpenAI's move from chat assistant to a general long-horizon \"do the work\" agent for knowledge workers, built on the Codex agent stack.","category":"agents","category_label":"Agents","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":5,"official":0,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]},{"id":"2026-05-07-openai-gpt-realtime-2-translate-whisper","url":"https://postcutoff.com/e/2026-05-07-openai-gpt-realtime-2-translate-whisper/","date":"2026-05-07","date_precision":"day","short_title":"OpenAI releases GPT-Realtime-2, GPT-Realtime-Translate and GPT-Realtime-Whisper","deck":null,"takeaway":"Reasoning moved into the low-latency voice loop instead of being bolted on via a separate text model, and live translation became a standalone API product, a month before Google's Gemini 3.5 Live Translate.","category":"model-release","category_label":"Model releases","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":7,"official":5,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]},{"id":"2024-05-13-gpt-4o","url":"https://postcutoff.com/e/2024-05-13-gpt-4o/","date":"2024-05-13","date_precision":"day","short_title":"OpenAI launches GPT-4o, a natively multimodal 'omni' model","deck":null,"takeaway":"Made natural voice interaction with AI mainstream and set the standard for omni-modal assistants.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI"]}],"people":[{"id":"simon-willison","name":"Simon Willison","url":"https://postcutoff.com/person/simon-willison/"}],"posts":[],"videos":[{"id":"openai-new-chatgpt-voice-gpt-live","title":"This is the new ChatGPT Voice, powered by GPT-Live","url":"https://postcutoff.com/v/openai-new-chatgpt-voice-gpt-live/"},{"id":"openai-listening-speaking-gpt-live","title":"Listening & Speaking with GPT-Live","url":"https://postcutoff.com/v/openai-listening-speaking-gpt-live/"}],"models":[{"id":"gpt-live-1","name":"GPT-Live 1","url":"https://postcutoff.com/m/gpt-live-1/"}],"changes":[{"date":"2026-10-16","type":"edit","text":"Linked the GPT-Live-1.1 update (Oct 15)"},{"date":"2026-09-30","type":"edit","text":"Added the Sept 10 API launch of GPT-Live-1"},{"date":"2026-09-29","type":"edit","text":"Added pre-GPT-Live voice-mode knowledge-cutoff note (Willison)"},{"date":"2026-09-29","type":"edit","text":"Linked the 2026-09-23 Voice plugins / Voice-in-Work entry"},{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-10-16","human_review":null,"version":{"date":"2026-10-16"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":69,"in_training_data":false},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":8,"in_training_data":false},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":99,"in_training_data":false},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":38,"in_training_data":false}],"short_url":"https://postcutoff.com/s/openai-gpt-live-full-duplex"}