Gemini 3.8 Flash TTS adds voice replication and prompt-designed voices

Google launched Gemini 3.8 Flash TTS and Flash-Lite TTS, letting users replicate a voice from 30 seconds of audio or design one from a text description. The post claims #1 on Hume's Voice Design Benchmark and top placement in Voice Arena across 6 languages.

Voices can be directed line by line with style and inline tags, with a consent check on replication and SynthID on every clip. Availability is through the Gemini API and Google AI Studio.