By No Code MBA · Facts checked
- Provider
- Announcement date
- Status at last check
- Generally available
- Model family
- Gemini 3.8
- Preceding model
- Gemini 3.1 Flash TTS
- Capabilities
- Audio
What changed
Gemini 3.8 Flash TTS (gemini-3.8-flash-tts) and Flash-Lite TTS (gemini-3.8-flash-lite-tts) generate speech in over 100 languages and dialects. New over Gemini 3.1 Flash TTS: voices designed from text prompts, a library of 2,000+ voices, voice replication from a 30-second sample with a consent recording, line-by-line delivery direction, two-speaker scenes and long-form generation with less speaker drift. Google reports Flash TTS ranks first on Hume AI's Voice Design Benchmark. Flash-Lite targets high-volume dubbing and voice agents.
Access and availability
Both models are available in the Gemini API and Google AI Studio. Flash TTS also powers Gemini Notebook and Flash-Lite TTS powers Google Vids, with Gemini Enterprise listed as coming soon.
Official access documentationPricing
Flash TTS: $0.50 per million text input tokens and $9.00 per million audio output tokens; Flash-Lite TTS: $0.50 per million input tokens and $6.00 per million audio output tokens (through December 31, 2026, then doubling to $1.00 input and $18.00 or $12.00 output)
Official pricingWhat you can build
Prompt a custom voice in Google AI Studio and rehearse line-by-line delivery in the dual-speaker editor before wiring it into your app through the Gemini API.
Limitations
Voice replication in AI Studio is unavailable in Illinois, Texas, the EEA, the UK, Switzerland and India, and voice remixing is listed as coming soon. Every clip carries a SynthID watermark. Listed prices double on January 1, 2027.