Gemini 3.8 Flash TTS and Flash-Lite TTS become generally available with a new Voices endpoint

Google made the Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS models generally available, along with the Gemini API Voices endpoint.

Flash TTS is positioned for studio-grade voice fidelity and long-form multi-turn stability, while Flash-Lite TTS targets high-throughput, real-time voice agents and replaces gemini-3.1-flash-tts-preview.

The update adds voice design, voice replication with consent verification, and access to 150+ prebuilt and custom voices.