Google released Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS, two new text-to-speech models in its Gemini Audio family. Flash TTS scored 71.4 on the Hume AI Voice Design Benchmark. The models add prompt-based voice design, line-by-line performance direction, and voice-replication safeguards, and they’re rolling out via the Gemini API and Google AI Studio with no open weights.
Simon Willison’s Weblog·3 weeks ago·
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● 9 sources
Google released two Gemini text-to-speech models, gemini-3.8-flash-tts and gemini-3.8-flash-lite-tts, along with a playground and a voice library. Generating 1 minute 18 seconds of audio with Gemini 3.8 Flash TTS took about 20 seconds and cost 2.74 cents. Users can now generate longer multi-character conversations and create custom voices using a 30-second audio sample.
Gemini Audio introduced two new text-to-speech models, Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS, for creating more expressive, customizable voice outputs. Gemini 3.8 Flash TTS scored 71.4 on Hume AI’s Voice Design Benchmark. The rollout starts today in Google AI Studio and the Gemini API, expanding line-by-line dialogue control, faster high-volume use, and voice customization options across Gemini products and partners.
Gemini 3.8 text-to-speech models were launched for generating custom character voices and directing scene dialogue in Google’s platforms.
The models are identified as “Gemini 3.8.”
This adds new text-to-speech capability across Google AI Studio, the Gemini API, Gemini Enterprise, Gemini Notebook, and Google Vids.
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