Activefastaudio Proprietary

Gemini 3.1 Flash TTS

by Google

Gemini 3.1 Flash TTS is a text-to-speech model from Google that generates natural-sounding speech from text input. It is part of the Gemini Flash family, optimized for low-latency and cost-effective audio generation. The model supports multiple voices and languages, making it suitable for various voice applications.

Official Site API Docs

Input cost

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Output cost

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Context window

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Max output

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Modalities

audio

License

proprietary

Capabilities

Text-to-SpeechMultiple VoicesMultiple LanguagesLow LatencyStreaming

Best For

Generating natural-sounding speech from text for real-time applications.

Strengths

Low latency for real-time use
Natural and expressive speech output
Supports multiple languages and voices
Cost-effective compared to premium TTS models

Limitations

Limited to audio output only
May not support all languages equally
Less customizable than some dedicated TTS engines

Use Cases

Voice assistants

Audiobook narration

Accessibility tools for visually impaired

Language learning apps

Customer service voice responses

Content creation for videos

Real-time translation with speech output

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