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Google

Gemini 3.1 Flash TTS Preview API

Google
About

Build advanced reasoning agents with Gemini 3.1 Flash TTS Preview, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.00/1M input and $20.00/1M output tokens. Access Gemini 3.1 Flash TTS Preview via the Google API with up to 16K output tokens.

Capabilities

Input Modalities

text

Output Modalities

audio
Reasoning
Yes
Structured Output
No
Tool Use
No
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
8K

Tokens

Input Limit
8K

Tokens

Max Output
16K

Tokens

Pricing

Standard (per 1M tokens)

Input
$1.00
Output
$20.00
Frequently Asked Questions

Gemini 3.1 Flash TTS Preview by Google costs $1.00 per 1M input tokens and $20.00 per 1M output tokens.

Model Details
ID
gemini-3.1-flash-tts-preview
Provider
Google
Family
gemini-flash
Release Date
Apr 15, 2026
Knowledge Cutoff
Jan 1, 2025
API Integration
NPM Package
@ai-sdk/google
Environment Variables
GOOGLE_API_KEY
GOOGLE_GENERATIVE_AI_API_KEY
GEMINI_API_KEY
Documentation