Gemini 3.1 Flash TTS Preview
Legacy preview text-to-speech model with steerable prompts and expressive audio tags.
Specs
- Context
- —
- Max output
- 16.4K
- Input price
- $1/ 1M tokens
- Output price
- $20/ 1M tokens
- Released
- 2026-02-26
Context
- Context window
- —
- Max input
- 8.2K
- Max output
- 16.4K
Pricing · USD / 1M tokens
- Input
- $1
- Output
- $20
- Cache read
- —
- Cache write
- —
Modalities
- Input
- Text
- Output
- Audio
API
- API types
Reasoning
- Reasoning
- No
Info
- Status
- Deprecated
- Released
- 2026-02-26
- Knowledge cutoff
- —
Features
- Confirmed
How to call
1 provider
googlemodel = gemini-3.1-flash-tts-preview
audio
POSThttps://generativelanguage.googleapis.com/v1beta/models/{model}:generateContent
batch
POSThttps://generativelanguage.googleapis.com/v1beta/models/{model}:batchGenerateContent
JSON
Standard format
{
"id": "gemini-3.1-flash-tts-preview",
"object": "model",
"created": 1772064000,
"owned_by": "google",
"name": "Gemini 3.1 Flash TTS Preview",
"api": {
"types": [
"audio",
"batch"
]
},
"limits": {
"context": null,
"input": 8192,
"output": 16384
},
"modalities": {
"input": [
"text"
],
"output": [
"audio"
]
},
"reasoning": {
"supported": false,
"efforts": []
},
"pricing": {
"currency": "USD",
"unit": "1M_tokens",
"input": 1,
"output": 20,
"cache_read": null,
"cache_write": null
},
"features": [
"batch"
],
"info": {
"status": "deprecated",
"release_date": "2026-02-26",
"knowledge_cutoff": null,
"description": "Legacy preview text-to-speech model with steerable prompts and expressive audio tags.",
"docs": "https://ai.google.dev/gemini-api/docs/models/gemini-3.1-flash-tts-preview",
"verified_at": "2026-10-11"
}
}Official sources
4