Google has officially launched Gemini 3.1 Flash TTS, a revolutionary text-to-speech model aimed at providing synthetic voices that are not only more natural but also more expressive and easier to manipulate. This cutting-edge technology is set to transform the way developers and content creators engage with voice synthesis.
According to industry benchmarks, Gemini 3.1 Flash TTS has made a significant impact, achieving a score of 1,211 Elo points on the TTS leaderboard published by Artificial Analysis. This score, derived from blind listening tests including thousands of human evaluations, positions it as the second-best model globally, trailing only Inworld TTS 1.5 Max, which scored 1,215, and surpassing ElevenLabs Eleven v3, which scored 1,179. Artificial Analysis has also recognized Gemini 3.1 Flash TTS as one of the most attractive options in the market, citing its balance of high-quality output and affordability.
A standout feature of the Gemini 3.1 Flash TTS is its innovative audio tags system. This feature empowers users to control various aspects of speech delivery using simple textual instructions. Developers can embed these tags within their scripts, enabling real-time adjustments to tone, pacing, and emotional expression. Reports indicate that the model supports over 200 different tags, providing unprecedented control that is rarely seen in traditional text-to-speech systems. This inline prompting capability allows for a straightforward approach to shaping the speech output, making it accessible for experimentation and refinement without the need for complex audio engineering skills.
Gemini 3.1 Flash TTS boasts support for more than 70 languages, along with an array of regional accents. It includes various English accents, such as American and British dialects, including Received Pronunciation (RP) and Brixton. Additionally, the model encompasses a diverse selection of global languages. For those using Google Workspace, the integration with Google Vids offers an impressive 30 conversational voice options across 24 languages, significantly enhancing accessibility and localization for both content creators and businesses.
Safety Measures with Built-in Watermarking
In response to growing concerns regarding AI-generated content, all audio produced by Gemini 3.1 Flash TTS includes an embedded SynthID watermark. This watermark is seamlessly integrated into the audio output, allowing for reliable detection of AI-generated material. Google emphasizes that this imperceptible watermark serves as a tool to help identify synthetic content, thereby reducing the risk of misinformation in audio media.
Google asserts that this approach aims to foster trust in AI-generated audio content by enabling verifiable identification of its origins, thereby addressing ethical concerns associated with deepfakes and misleading information.
How to Access Gemini 3.1 Flash TTS
Gemini 3.1 Flash TTS is currently available for developers, who can access it in preview mode through the Gemini API and Google AI Studio. Enterprises can test the model using Vertex AI, while Google Workspace users will find it integrated within Google Vids, making it readily accessible for various applications.
This launch is part of Google's broader strategy to enhance its AI capabilities, following its March AI push, which introduced more proactive tools and deeper personalization features for creators and developers alike.
As AI technology continues to evolve, Gemini 3.1 Flash TTS stands out as a significant advancement in the field of text-to-speech, promising to enhance both user experience and the quality of content produced in multiple languages and accents.
Source: eWEEK News