Your Expressive AI Speech Just Got Granular: Introducing Gemini 3.1 Flash TTS

Granular Control in AI Speech

You can now achieve finer-tuned control over nuances in emotional tone, emphasis, and delivery with the core innovation in Gemini 3.1 Flash TTS, which lies in its granular audio tags. These tags function as direct interfaces, allowing you to use natural language commands to dictate specific expressive qualities within generated speech. This capability is critical for applications requiring high fidelity and emotional congruence in synthesized voices.

The granular audio tags move beyond basic pitch and tempo adjustments, giving you more control over the generated speech. According to Artificial Analysis, this level of control places the model in the 'most attractive quadrant' for developers seeking advanced audio generation solutions. You can leverage this new model to push the boundaries of what AI speech can achieve.

Infrastructure Integration and Features

Your operational integration for Gemini 3.1 Flash TTS is streamlined through its availability on Google AI Studio and Vertex AI. This indicates a platform-first approach, meaning you can leverage this new model within your existing Google Cloud infrastructure and MLOps pipelines. The model supports over 70 languages, expanding its utility for global deployments and localization efforts.

The key features of Gemini 3.1 Flash TTS include:

• Granular audio tags for finer-tuned control over speech nuances
• Support for over 70 languages
• Availability on Google AI Studio and Vertex AI
• SynthID watermark for preventing misinformation

What This Means For Your Operations

With Gemini 3.1 Flash TTS, you gain a powerful, finely-controllable tool for audio content creation. For your development teams, the ability to specify intricate speech characteristics via natural language commands simplifies the iteration process and reduces the need for extensive post-processing. The integrated SynthID watermark also offers a pragmatic solution for compliance and ethical deployment in an era of increasing synthetic media scrutiny.

The Bottom Line for Developers

You are equipped with a new capability that enables more responsible and controllable approaches to AI-generated voice. By leveraging Gemini 3.1 Flash TTS, you can create more realistic and engaging audio content, while also addressing the challenges of preventing misinformation. This model is a significant step forward in the evolution of AI speech, and you can expect to see its impact in various applications and industries.