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Modelby Google

Gemini 3.1 Flash TTS

Gemini 3.1 Flash TTS is Google's next-generation text-to-speech model, offering expressive, natural-sounding speech generation across Google products and developer APIs. It is optimised for voice applications, conversational agents, and products requiring high-quality audio output.

Provider
Google
Released
Apr 15, 2026
Weights
Closed

Capabilities

  • Text To Speech
  • Speech Generation
  • Expressive Audio
  • Multimodal

Best For

  • Expressive Voice Applications
  • Tts In Products And Agents
  • Developer Audio Tools
  • Voice Interface Prototyping

Overview

Gemini 3.1 Flash TTS is Google's advanced text-to-speech model, released in April 2026 as part of the Gemini 3.1 model family. It focuses on expressive, natural-sounding speech generation — addressing a key limitation of earlier TTS models that often sound robotic or flat — and is available across Google's product ecosystem and developer APIs.

For engineering teams building voice-enabled developer tools, alert systems, or accessibility features, Gemini 3.1 Flash TTS provides a high-quality, production-ready speech synthesis layer integrated within the Gemini platform.

Key Capabilities

  • Expressive Speech Generation — natural, contextually appropriate intonation and emphasis
  • Multi-Voice Support — range of voices for different applications and personas
  • Developer API Access — available through the Gemini API for programmatic integration
  • Google Products Integration — powers voice features across Gemini app and related products
  • Low-Latency Output — Flash-tier optimisation for real-time voice streaming applications

Use Cases for Engineering Teams

  • Voice-Enabled Developer Tools — add spoken alerts and summaries to CI/CD monitoring dashboards
  • Accessibility Features — provide audio output for engineering documentation and changelog summaries
  • Conversational Agent Voice Layer — provide a high-quality voice interface for AI-powered developer assistants
  • Alert Audio Notifications — convert dependency drift or security advisory alerts into spoken notifications
  • Voice-First Prototyping — rapidly prototype voice interfaces for engineering productivity applications

Technical Specifications

  • Context Window: Not applicable (audio generation model)
  • Pricing: Not publicly announced at launch
  • Open Weight: No
  • Release Date: 2026-04-15

Provider

Gemini 3.1 Flash TTS is developed by Google. For the latest information, visit the official announcement.

Documentation

View Official Docs

Similar Models

Tags

text to speechaudiogooglegeminivoiceexpressiveproduction ready
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