Gemini 3.1 Flash TTS Preview is Google's text to speech model with a 8K context window and up to 16K output tokens. A preview text-to-speech variant of Gemini 3.1 Flash for early access to fast voice synthesis capabilities.
Specifications
Canonical IDgoogle-gemini-3-1-flash-tts-preview
TypeText to Speech
StatusActive
CreatorGoogleGoogle
Providers
Context Window8K tokens
Max Output16K tokens
Input ModalitiesText
Output ModalitiesAudio
Reasoning Effortsdefault
Knowledge Cutoff

Capabilities

Input1/5
Text
Image·
Audio·
Video·
PDF·
Output1/5
Text·
Image·
Audio
Video·
Embedding·
Capabilities1/13
Reasoning
Adaptive Reasoning·
Function Calling·
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Pricing by Provider

ProviderStandardBatch
Input
$ / 1M
Audio Out
$ / 1M
Input
$ / 1M
Audio Out
$ / 1M
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Google Gemini
gemini-3.1-flash-tts-preview
$1.00$20.00$0.500$10.00

Cost Calculator

Preset:

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Gemini 3 Flash1.0M$0.500$3.00Available
Gemini 3 Flash Preview1.0M$0.500$3.00Available
Gemini 3.1 Flash TTS Preview8KCurrent
Gemini 3 Flash ReasoningAvailable
Gemini 3 Flash Live$0.500$3.00Available
Gemini 3 Flash Live Live$0.750$4.50Available
Gemini 3.1 Flash ImageAvailable
Gemini 3.1 Flash Live$0.750$4.50Available
Gemini 3.1 Flash Live ImageAvailable
Gemini 3.1 Flash Live Preview131K$0.750$4.50Available
Gemini 3.1 Flash Live TTS$1.00Available

Other models

ModelTierReleasedContextInput / 1MOutput / 1M
Gemini 3.1 Flash LiteFlash-lite1.0M$0.250$1.50
Gemini 3.1 Flash Lite PreviewFlash-lite1.0M$0.250$1.50
Gemini 3.1 Pro Preview Custom ToolsPro1.0M$2.00$12.00
Gemini 3.1 Pro PreviewPro1.0M$2.00$12.00
Gemini 3 Pro PreviewPro1.0M$2.00$12.00
Gemini 3 Pro ImagePro66K$2.00$12.00
Gemini 3 Deep Think
Gemini 3 ProPro$2.00$12.00
Gemini 3 Pro Preview LowPro
Gemini 3 Pro Image GenerationPro

Model IDs