Introduction to Gemini 3.1 Flash TTS
Gemini 3.1 Flash TTS is a cutting-edge text-to-speech model that builds upon the capabilities of Gemini 3 Pro. It is available on Google AI Studio and Vertex AI, providing developers with a powerful tool for generating expressive AI speech. The model supports over 70 languages and 30 prebuilt voices, making it a versatile solution for a wide range of applications.
The Gemini 3.1 Flash TTS model is designed to provide a high level of controllability, allowing developers to steer the delivery of the speech using 200+ audio tags. These audio tags can be embedded directly into the text prompt, enabling precise control over the pacing and expressiveness of the generated audio.
One of the key features of Gemini 3.1 Flash TTS is its ability to support native multi-speaker dialogue. This allows developers to create more realistic and engaging conversations, with each speaker having their own unique voice and style.
Gemini 3.1 Flash TTS is based on Gemini 3 Pro, with the same model architecture, training dataset, and data processing. For more information on these aspects, please refer to the Gemini 3 Pro model card.
70+
supported languages
30
prebuilt voices
200+
audio tags
Getting Started with Gemini 3.1 Flash TTS
To get started with Gemini 3.1 Flash TTS, developers can choose a baseline voice from the 30 available prebuilt voices and a target language from the over 70 supported options. This selection serves as the foundation for the audio output.
Once the voice and language have been selected, developers can embed audio tags directly into the text prompt to control the pacing and expressiveness of the generated audio. The audio tags provide a high level of controllability, allowing developers to create more realistic and engaging speech synthesis.
Gemini 3.1 Flash TTS is available on Google AI Studio and Vertex AI, providing developers with a seamless and intuitive way to integrate the model into their applications. The model is also supported by a range of documentation and resources, including the Gemini 3 Pro model card.
For more information on getting started with Gemini 3.1 Flash TTS, please refer to the official documentation and tutorials.
💡 Tip
Make sure to check the official documentation for the most up-to-date information on using Gemini 3.1 Flash TTS.
Technical Details of Gemini 3.1 Flash TTS
Gemini 3.1 Flash TTS is based on Gemini 3 Pro, with the same model architecture, training dataset, and data processing. The model uses a combination of machine learning algorithms and audio processing techniques to generate highly natural and expressive speech synthesis.
The audio tags used in Gemini 3.1 Flash TTS provide a high level of controllability, allowing developers to control the pacing and expressiveness of the generated audio. The audio tags are embedded directly into the text prompt, enabling precise control over the speech synthesis.
Gemini 3.1 Flash TTS supports a range of audio formats, including WAV and MP3. The model can also be used to generate speech synthesis in a variety of languages, including English, Spanish, French, and many more.
For more information on the technical details of Gemini 3.1 Flash TTS, please refer to the official documentation and technical papers.
import librosa
audio, sr = librosa.load('audio_file.wav')Loading an audio file using Librosa

Conclusion and Future Directions
Gemini 3.1 Flash TTS is a powerful tool for generating expressive AI speech synthesis. The model provides a high level of controllability, allowing developers to control the pacing and expressiveness of the generated audio.
The audio tags used in Gemini 3.1 Flash TTS provide a high level of precision, enabling developers to create more realistic and engaging speech synthesis. The model is also supported by a range of documentation and resources, including the Gemini 3 Pro model card.
In the future, we expect to see Gemini 3.1 Flash TTS being used in a wide range of applications, from virtual assistants to language learning tools. The model has the potential to revolutionize the way we interact with computers, enabling more natural and intuitive communication.
For more information on Gemini 3.1 Flash TTS, please refer to the official documentation and tutorials.
1000+
potential applications
Comparison of Gemini 3.1 Flash TTS with other models
Comparison of Gemini 3.1 Flash TTS with other models
| Component | Open / This Approach | Proprietary Alternative |
|---|---|---|
| Model provider | Any — OpenAI, Anthropic, Ollama | Single vendor lock-in |
| Supported languages | 70+ | Limited language support |
| Audio tags | 200+ | Limited audio tags |
🔑 Key Takeaway
Gemini 3.1 Flash TTS provides a high level of controllability and expressiveness, making it a powerful tool for generating natural and intuitive speech synthesis. The model has the potential to revolutionize the way we interact with computers, enabling more realistic and engaging communication.
Key Links