Google Releases Gemini 3.1 Flash TTS with Prompt-Directed Text-to-Speech

Summary

Google has released Gemini 3.1 Flash TTS, a new text-to-speech model accessible via the standard Gemini API under the model ID gemini-3.1-flash-tts-preview. The model is notable for its ability to be directed using natural language prompts, allowing users to control speech characteristics such as tone, style, and delivery through prompt engineering rather than fixed parameter settings. This release extends Google's Gemini model family into the speech synthesis domain, continuing a broader indus