Gemini TTS 3.8 Flash

Release Summary

Google's flagship creative text-to-speech model, API ID gemini-3.8-flash-tts. Natural-language voice design, a library of 2,000+ voices, consented voice replication from a 30-second sample, and line-level style control across 130 languages. Google reports 71.4 on Hume AI's Voice Design Benchmark and 60.8 on accent modeling, and first place on Hume's Overall Quality Index. Input limit 8,192 tokens and output limit 16,384. Google AI Studio lists $0.50/M text input and $9/M audio output. Every clip carries a SynthID watermark. Rolling out in the Gemini API, Google AI Studio, and Google Vids. Volume sibling: Gemini TTS 3.8 Flash-Lite.

Timeline

Other Gemini TTS versions