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Ongoing case: Google's Gemini models 5 stories

Google says Gemini 3.8 Flash TTS and Flash-Lite TTS are rolling out from September 23, 2026 in the Gemini API.

The text-to-speech models build custom voices from natural-language prompts across more than 100 languages, with SynthID watermarking on all generated audio.

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1 Gemini 3.8 text-to-speech says helloGoogle · 23 Sep 2026 · 4 facts Open the source

  1. Google introduced two new models, Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS, on September 23, 2026.

    Sep 23, 2026 — Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS are our most expressive audio generation models yet.

  2. The models create custom voices from natural-language prompts and can replicate a voice from a 30-second audio sample, across more than 100 languages.

    create bespoke voices from scratch by customizing role, accent and voice characteristics across more than 100 languages and dialects using natural language prompting ... Recreate consistent vocal profiles from just a 30-second audio sample

  3. All generated audio carries SynthID watermarking, and voice replication requires consent verification.

    every audio clip generated by our Gemini Audio models is watermarked with SynthID ... For voice replication our system leverages consent verification: users must provide a verbal consent recording from the voice owner

  4. Google says both models are rolling out starting September 23, 2026 in the Gemini API and Google AI Studio.

    Toned down to what the source says
    Gemini 3.8 Flash-Lite TTS is rolling out starting today: For developers: In the Gemini API and Google AI Studio

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