Gemini 3.1 Flash TTS: High‑Control Expressive Speech
🔊 Gemini 3.1 Flash TTS is now available on Google AI Studio and Vertex AI, delivering high-fidelity, expressive speech with granular control. Developers can steer voice style, pacing, and non-verbal cues using 200+ inline audio tags and select from 70+ languages and 30 prebuilt voices. Generated audio is watermarked with SynthID to help identify AI-created content. The model supports programmatic annotation workflows to scale long-form or batch audio generation.
