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Google Launches Gemini 3.1 Flash TTS for AI Audio

Gemini 3.1 Flash TTS

Google announced the release of Gemini 3.1 Flash TTS on April 15, 2026. According to a company press release, this next-generation text-to-speech model provides high-fidelity audio with emotional nuance. The model utilizes "audio tags" to allow vocal delivery control through natural language commands like [whispers] or [shouts]. It currently supports over 70 languages and is integrated into Google Vids, the Gemini API, and Vertex AI.

Natural Language Control and Emotional Nuance

The core innovation of Gemini 3.1 Flash TTS is its ability to interpret emotional context from text. According to Google's technical specifications, creators can dictate tone and style by embedding specific tags within the input. This functionality removes the need for complex manual editing. The model aims to bridge the gap between synthetic voices and human-like narration for enterprise use.

Enterprise Integration and Safety Measures

Google has embedded the model into Google Vids, its AI-powered video creation tool. To address concerns regarding deepfakes, the model incorporates SynthID watermarking. According to Google, this digital forensic tool embeds imperceptible markers into the audio. These markers ensure AI-generated content is identifiable for safety and compliance purposes.

Global Availability and Developer Access

As of April 16, 2026, Gemini 3.1 Flash TTS is available through Vertex AI. Supporting more than 70 languages at launch allows for localized content creation. This availability may reduce costs associated with professional voiceover services for corporate training and marketing.

Conclusion

The launch of Gemini 3.1 Flash TTS represents a shift toward more accessible, high-quality voice synthesis. By combining natural language control with safety features like SynthID, Google provides a comprehensive tool for global enterprise applications.

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