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September 22, 2026 · Google Gemini APIGA

Gemini 3.8 Flash TTS and Flash-Lite TTS generally available, plus Voices endpoint

  • Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS generally available (GA) : Released our next-generation text-to-speech (TTS) audio models and the Gemini API Voices endpoint (/v1beta/voices):
  • Gemini 3.8 Flash TTS (gemini-3.8-flash-tts): Flagship creative TTS model engineered for studio-grade voice fidelity, nuanced acting, regional dialects, and long-form multi-turn stability.
  • Gemini 3.8 Flash-Lite TTS (gemini-3.8-flash-lite-tts) : Fast, cost-efficient TTS model built to replace gemini-3.1-flash-tts-preview for high-throughput production and real-time voice agent cascades.
  • Voice design, Voice replication, and the Extended Voice Library: Create persistent custom vocal personas from text prompts, replicate voices with consent verification, and query 150+ prebuilt and custom voices.

    See the Text-to-speech guide to get started.
Read the Google Gemini API changelog
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