Gemini 3.1 Flash Live (preview)
Speech and audio
gemini-3.1-flash-live-preview
$0.75 in, $4.50 out per 1M tokens
Gemini 3.1 Flash TTS (preview)
Model idgemini-3.1-flash-tts-preview
Price$1 in, $20 out per 1M tokens
Checked29 September 2026
Where it stands
61newer speech and audio models since its release
- NVIDIA Nemotron 3.5 Transcribe (30B-A4B)28 Oct 2026
- Hy-SimulMT-30B-A3B22 Oct 2026
- Eleven Realtime v1 Max / Mini20 Oct 2026
- Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)20 Oct 2026
- Voxtral Small Transcribe 320 Oct 2026
The 5 newest are listed. All speech and audio models
- Before it from Google
- Gemini 3.1 Flash Live (preview)26 Mar 2026
- After it from Google
- Gemini 3.5 Live Translate9 Jun 2026
- Weights
- Closed weights; access is hosted only.
How to call it
2 ways to use Gemini 3.1 Flash TTS (preview), with the model id each provider expects.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Gemini API | gemini-3.1-flash-tts-preview |
https://generativelanguage.googleapis.com/v1beta/models/gemini-3.1-flash-tts-preview:generateContent |
ai.google.dev |
| Google Cloud Text-to-Speech (Gemini-TTS) | Gemini 3.1 Flash TTS (Preview) |
cloud.google.com |
Pricing
| Input | $1 per 1M tokens |
|---|---|
| Output | $20 per 1M tokens |
As published: “per 1M tokens (USD), text in / audio out (25 audio tokens per second)”.
Source: ai.google.dev, checked 29 September 2026.
Specs
- Input
- Text
- Output
- Audio
- Context window
- Not published
- Max output
- Not published
- Open weights
- No
- Licence
- Proprietary
- Released
- 15 April 2026
- Status
- Legacy
- Type
- Speech and audio
What stands out
What its maker marketed at launch, and what people found later, each with its source.
Steerable expressive TTS
‘Cost-efficient, expressive, and steerable text to speech’ controlled with natural-language prompts.
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Superseded by gemini-3.8-flash-tts (GA 2026-09-22), which is cheaper at intro pricing ($0.50/$9.00).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.
Sources: models, changelog, Gemini pricing, Cloud TTS pricing.