# Google AI Studio previews Gemini 3.1 Flash TTS

By Steven Van · 2026-04-15

The text-to-speech model adds inline audio tags, multi-speaker dialogue and 70+ languages, with SynthID watermarking on all output.

Google AI Studio users can now test **Gemini 3.1 Flash TTS**, a new text-to-speech model rolling out in preview via the Gemini API. The model adds audio tags: natural-language commands embedded in text input that control vocal style, pacing and delivery, alongside native multi-speaker dialogue and support for 70+ languages.

In the AI Studio Playground, developers can set scene direction for multi-turn dialogue, cast speakers with Audio Profiles and Director's Notes for pace, tone and accent, and use inline tags to shift expression mid-sentence. Finished configurations can be exported as Gemini API code to keep voices consistent across projects. All generated audio is watermarked with SynthID.

Read the [full announcement](<https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-1-flash-tts/>).

[![](<https://storage.googleapis.com/gweb-uniblog-publish-prod/images/gemini-3.1-flash-tts_metacard_dark_1920x1080.width-1300.png>)](<https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-1-flash-tts/>)

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Google AI Studio

Build, test, and deploy AI apps with Gemini — Google's free web-based IDE for generative AI prototyping.

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Sources

[Original source](<https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-1-flash-tts/>)

[Read Google AI Studio previews Gemini 3.1 Flash TTS on Creators Toolbox](<https://creatorstoolbox.com/blog/google-ai-studio-gemini-3-1-flash-tts>)

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Canonical source: https://creatorstoolbox.com/blog/google-ai-studio-gemini-3-1-flash-tts