Gemini 3.1 Flash TTS API
Gemini 3.1 Flash TTS reads text aloud in 70+ languages and takes plain-language direction on tone, pace, accent and emotion.
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What Gemini 3.1 Flash TTS is good for
Gemini 3.1 Flash TTS is Google's expressive text-to-speech model, released as a preview, built so you can direct a voice much as you would a voice actor. You describe the character, scene and accent in ordinary language, adjust individual moments with more than 200 inline audio tags, and give several speakers their own voices in a single file. It suits audiobooks, podcasts, lessons and localized content.
- Audiobook chapters with distinct character voices and pacing
- Two-voice podcast or interview segments from one script
- Localized voiceovers of the same video in many languages
- Lessons that pause, slow down and stress the key points
- Voice assistant replies with a consistent persona and accent
Gemini 3.1 Flash TTS pricing
| Option | Price, USD | Video Blade tokens |
|---|---|---|
| Text to Speech · input | tokens | |
| Text to Speech · Audio Output | tokens |
Prices are per 1M text tokens (about 750,000 words of model text) and live from our price list. Tokens are held when a run starts and settled to what was actually used; a failed run costs nothing.
Gemini 3.1 Flash TTS is coming soon to Video Blade
It is listed with its live price so you can compare it. You can't order it through Video Blade yet.
Gemini 3.1 Flash TTS FAQ
How much does Gemini 3.1 Flash TTS cost?
1M text tokens from . Prices are live from our price list, and you see the exact price before anything runs.
What is the difference between style instructions and audio tags in Gemini 3.1 Flash TTS?
Style instructions set the overall performance in ordinary words, for example a calm late-night radio host with a soft Southern accent. Audio tags sit inside the text and change specific moments, adding a pause, a whisper, laughter or a shift in pace mid-sentence. Use instructions for the baseline and tags for individual moments.
What changed from Gemini 2.5 Flash TTS to Gemini 3.1 Flash TTS?
Google upgraded the sound of the speech itself, how finely you can steer emotion and delivery, how many languages are covered and how much room you have to direct the voice in your own words. The result is clearer pronunciation, smoother transitions and delivery that tracks the intent of the script more closely.
Can I use Gemini 3.1 Flash TTS on Video Blade today?
Not yet. Gemini 3.1 Flash TTS is listed with its live price so you can compare it with the models you can use today; ordering it through Video Blade is coming soon.
How is Gemini 3.1 Flash TTS billed?
Per million text tokens of the model, with separate rates for the text you send and the text you get back. Tokens are held when a run starts and settled to what was actually used; a failed run costs nothing. Current prices are shown on this page.
Gemini 3.1 Flash TTS in the Video Blade API
google-gemini-3-1-flash-ttsOrdering this model through the API is coming soon.