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

What this rests on

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

   Gemini 3.8 text-to-speech says hello · Google · 2026-09-23
   over 100 languages

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.

   Gemini 3.8 text-to-speech says hello · Google · 2026-09-23
   over 100 languages

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

   Gemini 3.8 text-to-speech says hello · Google · 2026-09-23
   over 100 languages

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

   narrowed to what the source supports
   Gemini 3.8 text-to-speech says hello · Google · 2026-09-23
   over 100 languages

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Filed under

• Machine-readable marking of generated content watching
• Gemini
• Google
• SynthID

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