Executive Summary
Google has announced Gemini 3.1 Flash TTS, its latest text-to-speech model, now available in preview for developers, enterprises, and Workspace users. The model delivers significantly more natural and expressive AI-generated speech with support for over 70 languages. The key innovation is the introduction of "audio tags," which allow users to embed natural language commands directly into text to precisely control vocal style, pace, and delivery.
Key Takeaways
* Product Name: Gemini 3.1 Flash TTS.
* Primary Function: A text-to-speech model that generates high-quality, expressive audio with granular user control.
* Key Features & Capabilities:
* Audio Tags: Users can embed natural language commands in the input text to direct vocal style, pace, and tone.
* Improved Quality: Achieved a high benchmark Elo score of 1,211 for natural-sounding speech, noted for its blend of quality and low cost.
* Developer Tools: Google AI Studio provides controls for scene direction, speaker-specific notes, and exporting settings for consistent API use.
* Global Scale: Supports over 70 languages and native multi-speaker dialogue.
* Security: All generated audio is watermarked with SynthID to reliably detect AI-generated content.
* Target Audience: Developers (via Gemini API and Google AI Studio), enterprises (via Vertex AI), and Google Workspace users (via Google Vids).
* Availability: Rolling out now in preview across the specified platforms.
Strategic Importance
This update positions Google to compete on fine-grained creative control in the AI voice market, enabling developers and enterprises to create more immersive and brand-specific audio experiences.