{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/gpt-realtime-2-1/","md":"https://postcutoff.com/m/gpt-realtime-2-1/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-realtime-2-1","name":"GPT-Realtime-2.1","org":"OpenAI","family":"GPT Realtime","released":"2026-07-06","status":"current","type":"audio/speech","modality_in":["text","audio","image"],"modality_out":["text","audio"],"open_weights":false,"model_license":"proprietary","context_window":128000,"max_output":32000,"knowledge_cutoff":"2024-09","pricing":{"text_input":4,"text_output":24,"audio_input":32,"audio_output":64,"cached_input":0.4,"image_input":5,"unit":"per 1M tokens (USD)","source":"https://developers.openai.com/api/docs/pricing"},"price_line":"$4 text in, $24 text out per 1M tokens","access":[{"provider":"OpenAI API","model_id":"gpt-realtime-2.1","endpoint":"wss://api.openai.com/v1/realtime","docs":"https://developers.openai.com/api/docs/models/gpt-realtime-2.1"},{"provider":"Azure OpenAI (Microsoft Foundry)","model_id":"gpt-realtime-2.1","docs":"https://learn.microsoft.com/en-us/azure/foundry/foundry-models/concepts/models-sold-directly-by-azure"}],"capabilities":[{"name":"Reasoning in realtime voice","detail":"Configurable reasoning effort in a speech-to-speech model (at a latency cost).","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-realtime-2.1"},{"name":"Robust turn-taking","detail":"Improved alphanumeric recognition, silence/noise handling and interruption behavior.","first":false,"discovered":"launch","source":"https://developers.openai.com/api/docs/models/gpt-realtime-2.1"}],"entry":null,"notes":"Realtime API only. Successor to gpt-realtime-2 (2026-05-07, same prices, see gpt-realtime-2.md). Mini variant gpt-realtime-2.1-mini (audio $10/$20, text $0.60/$2.40). Replaces gpt-realtime / gpt-4o-realtime (shutdown Jan 20 2027). Azure version 2026-07-07.","verified":"2026-09-29","body_md":"Low-latency voice agents over WebRTC/WebSocket (`/v1/realtime?model=gpt-realtime-2.1`).\n\nSources:\n- https://developers.openai.com/api/docs/models/gpt-realtime-2.1\n- https://developers.openai.com/api/docs/pricing\n- https://developers.openai.com/api/docs/changelog\n- https://developers.openai.com/api/docs/deprecations\n- Models overview: https://developers.openai.com/api/docs/models","page_url":"https://postcutoff.com/m/gpt-realtime-2-1/","standing":{"kind":"speech and audio","newer_count":48,"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","name":"GPT-Realtime-2","org":"OpenAI","released":"2026-05-07","page_url":"https://postcutoff.com/m/gpt-realtime-2/"},"after":{"id":"gpt-live-1","name":"GPT-Live 1","org":"OpenAI","released":"2026-07-08","page_url":"https://postcutoff.com/m/gpt-live-1/"},"weights":"closed","licence":"proprietary","licence_permissive":false,"summary":"Closed weights; access is hosted only."}}