Google Launches Gemini 3.8 Flash TTS and Flash-Lite TTS Models
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We’re launching Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS ⚡️ Our most expressive audio models yet let you create custom voices across 100+ languages or pick from 2,000+ ready-to-use ones. You can direct back-and-forth conversations, guide the delivery line-by-line, and add natural cues like <laughs> or an active listening interjection like |mhm| all while generating hours of consistent, glitch-free audio. Sounds pretty cool, right? So… how should you use them? — Gemini 3.8 Flash TTS: Need to design bespoke vocal personas from scratch and with line-by-line level control? This is the model! Built for high-fidelity creative production like gaming, immersive audiobooks, and podcasts. — Gemini 3.8 Flash-Lite TTS: Want the AI to automatically adjust its tone and pacing on the fly for near real-time voice agents? This is your engine! Built for cost-efficient scale, high-volume dubbing, and bulk audio creation.
Rolling out starting today: — Developers: Both models in @GoogleAIStudio and the Gemini API — Consumers: Gemini 3.8 Flash TTS in @Gemini_Notebook and Gemini 3.8 Flash-Lite TTS in Google Vids — Coming soon: Both models in Gemini Enterprise https://t.co/BYjN0F9BmG
Context
Google DeepMind's Gemini 3.8 Flash TTS and Flash-Lite TTS take a script with bracketed cues embedded directly in the text, such as a laugh marker or a written interjection, and use those cues to control delivery, rather than requiring a separate settings panel for tone and pacing. The models support creating custom voices from scratch or choosing from more than 2,000 ready-made ones, across more than 100 languages, and can generate hours of audio with a consistent character across a long script.
The two models target different jobs: Flash TTS is built for high-fidelity, line-by-line directed production such as game dialogue, audiobooks, and podcasts, while Flash-Lite TTS is built to adjust tone and pacing automatically in near real time, aimed at cost-efficient, high-volume use like live voice agents and bulk dubbing. Both are rolling out through Google AI Studio and the Gemini API now, with Flash TTS also available in Gemini Notebook and Flash-Lite TTS in Google Vids, and both are described as coming soon to Gemini Enterprise.
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