Gemini 3.1 Flash TTS: the next generation of expressive AI speech

Google DeepMind · 3 months ago

Google introduced Gemini 3.1 Flash TTS, a text-to-speech model that adds granular audio tags allowing developers to control vocal style, pace, and delivery through natural language commands. The model achieved an Elo score of 1,211 on the Artificial Analysis TTS leaderboard and supports over 70 languages with native multi-speaker dialogue. Developers can now export precise voice parameters as API code, enabling consistent character voices across projects while all generated audio includes SynthID watermarking for AI-content detection.