Gemini 3.1 Flash TTS (preview)
Superseded by gemini-3.8-flash-tts (GA 2026-09-22), which is cheaper at intro pricing ($0.50/$9.00).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.
- Input
- text
- Output
- audio
- License
- proprietary
- Pricing
- input: $1 · output: $20 (per 1M tokens (USD), text in / audio out (25 audio tokens per second)) source
- Verified
- 2026-09-29
How to call it
| Provider | Model id | Endpoint / URL | Docs |
|---|---|---|---|
| Gemini API | gemini-3.1-flash-tts-preview | https://generativelanguage.googleapis.com/v1beta/models/gemini-3.1-flash-tts-preview:generateContent | docs |
| Google Cloud Text-to-Speech (Gemini-TTS) | Gemini 3.1 Flash TTS (Preview) | — | docs |
Notable capabilities (1)
- Steerable expressive TTS: 'Cost-efficient, expressive, and steerable text to speech' controlled with natural-language prompts. source
Sources: models, changelog, Gemini pricing, Cloud TTS pricing.
Other Google DeepMind models
Gemini 3.8 Flash TTS · Gemini 3.8 Live · Gemini 3.8 Flash · Gemini 3.5 Transcribe (and Transcribe Live) · Lyria 3.5 · Gemini 3.5 Flash-Lite · Nano Banana 2 Lite (Gemini 3.1 Flash-Lite Image) · Gemini Omni Flash (Omni 1.1 Flash) · Gemini Embedding 2 · Gemma 4 · Nano Banana 2 (Gemini 3.1 Flash Image) · Nano Banana Pro (Gemini 3 Pro Image) · Gemini Robotics 2 · Gemini Robotics ER 2 · Gemini Robotics On-Device 2 · Gemini 3.5 Live Translate · Gemini 3.1 Pro · Veo 3.1 · Genie 3 · Lyria RealTime · Gemini 3.7 Flash · Gemini 3.6 Flash · Gemini 3.5 Flash · Gemini 3.1 Flash Live (preview) · Lyria 3 (Clip / Pro) · Lyria 2 · Gemini 2.5 Flash Native Audio (Live, preview) · Gemini 2.5 Flash-Lite · Gemini 2.5 Flash · Gemini 2.5 Pro · Gemini 2.5 Flash TTS / Pro TTS · Gemini 3.1 Flash-Lite · Nano Banana (Gemini 2.5 Flash Image) · Gemini Robotics-ER 1.5 / 1.6 · Imagen 4