Google launches Gemini 3.8 Flash TTS and Flash-Lite TTS with 2,000+ voices, 100+ languages
Google released two new text-to-speech models, Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS, described as its most expressive audio generation models yet, supporting over 100 languages. The models offer a library of over 2,000 voices and allow custom voice creation from a 30-second audio sample, with an API that supports multi-character conversations with distinct voices and style instructions.
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Google : Google releases Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS, its “most expressive audio generation models yet”, with support for more than 100 languages — Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS are our most expressive audio generation models yet.
Simon Willison
Tool: Gemini 3.8 TTS Playground Google released two new Gemini text-to-speech models today - gemini-3.8-flash-tts and gemini-3.8-flash-lite-tts . They come with a library of over 2,000 voices, plus the ability to create a custom voice with "just a 30-second audio sample of your voice or a voice you have the rights to use". I vibe coded this bring-your-own-key playground interface with GPT-6 Astra, taking advantage of the open CORS policy of the underlying Gemini API. A notable feature of the API is that it makes it easy to define a full conversation between multiple characters, each with different voices and voice style instructions. Here's a short demo clip of a conversation between two pelicans debating if they should move to the Pacifica Pier . I had Claude 4.5 Opus write the script and generate a URL to render it using the tool . Your browser does not support the audio element. It took ~20 seconds to generate 1m 18s of audio using Gemini 3.8 Flash TTS (not the cheaper Flash-Lite),
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