Guide to prompting Gemini 3.1 Flash TTS (text-to-speech)

Gemini 3.1 Flash TTS is now available on Google AI Studio and Vertex AI, offering precise controllability and expressivity for developers to build advanced AI-speech applications. The model introduces 200+ audio tags to steer delivery and is available in 70+ languages. To get started, choose a baseline voice and language, use natural language instructions for stylization, and embed audio tags into text prompts. This allows developers to control pacing, expressiveness, and delivery with high granularity.