gemini-3.1-flash-tts-preview

ttsproprietary

The Gemini 3.1 Flash TTS Preview model provides powerful, low-latency speech generation with natural outputs, steerable prompts, and expressive audio tags for precise narration control.

Context
8K
Max output
16K
Input price
$1/1M tokens
Output price
$20/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Batch Processing

Details

Provider Google AI
Creator google
Familygemini-3.1
Licenseproprietary
Statusactive
Typetts
Input modalitiesaudio, image, text
Output modalitiesspeech
Open weightNo
Parameters—
Architecture—
Max chars—
Sample rate—
Voices—
Languages—
Release date—
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

Generate ContentPOST
Generate text from multimodal inputhttps://generativelanguage.googleapis.com/v1beta/v1beta/models/{model}:generateContent
Stream ContentPOST
Stream text generation responseshttps://generativelanguage.googleapis.com/v1beta/v1beta/models/{model}:streamGenerateContent

Pricing

Text tokensPer 1M tokens
InputCached inputOutput
Standard$1—$20
Batch$0.5—$10

Family Comparison: gemini-3.1

ModelContextMax outPricing
gemini-3.1-flash-lite-image66K4K$0.25$1.5
gemini-3.1-flash-lite-preview1.0M66K$0.25$1.5
gemini-3.1-flash-lite1.0M66K$0.25$1.5
gemini-3.1-flash-image-preview131K33K$0.5$3
gemini-3.1-flash-image131K33K$0.5$3
gemini-3.1-flash-live-preview131K66K$0.75$4.5
gemini-3.1-flash-tts-preview8K16K$1$20
gemini-3.1-pro-preview1.0M66K$2$12

API

GET/v1/models/google/gemini-3.1-flash-tts-preview

gemini-3.1-flash-tts-preview

The Gemini 3.1 Flash TTS Preview model provides powerful, low-latency speech generation with natural outputs, steerable prompts, and expressive audio tags for precise narration control.

Changes · 5 entries
gemini-3.1-flash-tts-previewupdateca7a400Nov 2, 2026, 03:02 AM
descriptionThe Gemini 3.1 Flash TTS Preview model provides powerful,...→The Gemini 3.1 Flash TTS Preview model provides powerful,...
gemini-3.1-flash-tts-previewupdate99b2555Sep 25, 2026, 06:38 AM
descriptionThe Gemini 3.1 Flash TTS Preview model provides powerful,...→The Gemini 3.1 Flash TTS Preview model provides powerful,...
gemini-3.1-flash-tts-previewupdatee3d7dedAug 31, 2026, 04:13 AM
descriptionThe Interactions API is now generally available. We recom...→The Gemini 3.1 Flash TTS Preview model provides powerful,...
gemini-3.1-flash-tts-previewupdate88d97e5Jun 30, 2026, 04:49 AM
descriptionThe Gemini 3.1 Flash TTS Preview model provides powerful,...→The Interactions API is now generally available. We recom...
gemini-3.1-flash-tts-previewcreate5b18252Apr 16, 2026, 07:01 AM