Gemini 3.8 Flash-Lite TTS

Gemini 3.8 Flash-Lite TTS is a text-to-speech model developed by Google, optimized for high-throughput, cost-efficient production workloads across a wide range of applications. Ranking high on audio quality benchmarks like Hume AI's Overall Quality Index, it serves as a lightweight alternative to the flagship Gemini 3.8 Flash TTS while sharing the same request schema and formatting. The model is engineered to support bulk voiceovers, conversational voice agents, and read-aloud capabilities across 101 languages.

Key Capabilities

The model supports precise audio generation features, including natural-language voice design, voice replication from short audio samples, and multi-speaker dialogue setups. Developers can guide the delivery style using inline vocal tags and speech metadata parameters to control tone, pacing, and emotional nuance without altering the spoken transcript text. It incorporates built-in safety features and digital watermarking, including SynthID technology, to ensure responsible audio generation.