Gemini 3.8 text-to-speech says hello

Introduces Gemini 3.8 Flash TTS and Gemini 3.8 Flash-Lite TTS, two new text-to-speech models. Gemini 3.8 Flash TTS enables generative voice design from natural language prompts, voice replication from 30-second audio samples with consent verification and SynthID watermarking, and voice remixing. Both models provide granular control over line-by-line delivery, long-form generation, native two-speaker scene staging, and scripted vocal bursts. The models achieve top rankings on Hume AI's Voice Design Benchmark and Overall Quality Index, and perform well in blind human preference evaluations on Voice Arena across multiple languages. They support over 100 languages and are integrated into Google AI Studio, Gemini API, Gemini Notebook, and Google Vids.