Gemini 3.1 Flash TTS is the latest text-to-speech model that delivers enhanced controllability, expressiveness, and speech quality, empowering developers, enterprises, and everyday users to build the next generation of AI speech applications.
Key Features
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Improved Speech Quality and Controllability: Gemini 3.1 Flash TTS is the most natural and expressive model to date, achieving an Elo score of 1,211 on the Artificial Analysis TTS leaderboard, showcasing an ideal blend of high-quality speech generation and low cost.
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New Audio Tags: This model introduces audio tags, allowing control over vocal style, pacing, and delivery using natural language commands. Developers can experiment in Google AI Studio with configuration controls such as scene direction and speaker-level specificity.
Developer Experience
- Scene Direction: Define the environment and provide specific dialogue instructions to help characters react naturally across multiple turns.
- Speaker-Level Specificity: Utilize unique audio profiles and director’s notes to adjust pace, tone, and accent.
- Seamless Export: Export the adjusted parameters as Gemini API code for consistency across different projects and platforms.
Global Scale Application
Gemini 3.1 Flash TTS supports over 70 languages, delivering high-fidelity speech and more precise control, helping developers create localized, expressive speech experiences for global users. All audio generated is watermarked with SynthID, ensuring reliable detection of AI-generated content to prevent misinformation.
Blogger's Review: The launch of Gemini 3.1 Flash TTS marks a significant leap in AI speech generation technology. With the introduction of audio tags and multi-language support, developers can enhance the naturalness of speech while achieving rich personalized expressions, greatly broadening the scope and depth of application scenarios. The watermarking technology also ensures the authenticity of content, making it a noteworthy advancement in the field.