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

Google launched Gemini 3.1 Flash TTS on April 15, 2026, a text-to-speech model that lets developers control vocal style, pace, and delivery through natural language commands called Audio Tags. The model supports over 70 languages, runs across Google AI Studio, Vertex AI, and Google Vids, and watermarks every audio output with SynthID to flag AI-generated content.

This story matters because it signals a shift in how AI agents are being adopted across the industry. We are tracking this development closely and will report on follow-up impacts as they emerge.

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