{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/gemini-3-1-flash-tts/","md":"https://postcutoff.com/m/gemini-3-1-flash-tts/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":"gemini-3-1-flash-tts","name":"Gemini 3.1 Flash TTS (preview)","org":"Google DeepMind","family":"Gemini 3.1","released":"2026-04-15","status":"legacy","type":"audio/speech","modality_in":["text"],"modality_out":["audio"],"open_weights":false,"model_license":"proprietary","context_window":null,"max_output":null,"knowledge_cutoff":null,"pricing":{"input":1,"output":20,"unit":"per 1M tokens (USD), text in / audio out (25 audio tokens per second)","source":"https://ai.google.dev/gemini-api/docs/pricing"},"price_line":"$1 in, $20 out per 1M tokens","access":[{"provider":"Gemini API","model_id":"gemini-3.1-flash-tts-preview","endpoint":"https://generativelanguage.googleapis.com/v1beta/models/gemini-3.1-flash-tts-preview:generateContent","docs":"https://ai.google.dev/gemini-api/docs/models"},{"provider":"Google Cloud Text-to-Speech (Gemini-TTS)","model_id":"Gemini 3.1 Flash TTS (Preview)","docs":"https://cloud.google.com/text-to-speech/pricing"}],"capabilities":[{"name":"Steerable expressive TTS","detail":"'Cost-efficient, expressive, and steerable text to speech' controlled with natural-language prompts.","first":false,"discovered":"launch","source":"https://ai.google.dev/gemini-api/docs/changelog"}],"entry":null,"notes":"Superseded by gemini-3.8-flash-tts (GA 2026-09-22), which is cheaper at intro pricing ($0.50/$9.00). Still served as preview; also billed in Cloud TTS at the same $1/$20.","verified":"2026-09-29","body_md":"Sources: [models](https://ai.google.dev/gemini-api/docs/models), [changelog](https://ai.google.dev/gemini-api/docs/changelog), [Gemini pricing](https://ai.google.dev/gemini-api/docs/pricing), [Cloud TTS pricing](https://cloud.google.com/text-to-speech/pricing).","page_url":"https://postcutoff.com/m/gemini-3-1-flash-tts/","standing":{"kind":"speech and audio","newer_count":61,"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":"gemini-3-1-flash-live","name":"Gemini 3.1 Flash Live (preview)","org":"Google DeepMind","released":"2026-03-26","page_url":"https://postcutoff.com/m/gemini-3-1-flash-live/"},"after":{"id":"gemini-3-5-live-translate","name":"Gemini 3.5 Live Translate","org":"Google DeepMind","released":"2026-06-09","page_url":"https://postcutoff.com/m/gemini-3-5-live-translate/"},"weights":"closed","licence":"proprietary","licence_permissive":false,"summary":"Closed weights; access is hosted only."}}