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Gemini 3.1 Flash TTS

Gemini 3.1 Flash TTS is a verified current AI model with official specifications, pricing or access details, capabilities, practical use cases, strengths and limitations.

Text to SpeechTextAudio Freemium
In plain English

What is this model and why does it matter?

Gemini 3.1 Flash TTS is Google's low-latency text-to-speech preview model with natural outputs, steerable prompts and expressive audio tags for narration control.

NarrationVoiceoversAudiobooksAssistive speechConversational audio generation
Model overview

Gemini 3.1 Flash TTS: features, use cases and important details

Gemini 3.1 Flash TTS is a current AI model verified from first-party Google sources.

Gemini 3.1 Flash TTS verified specifications

Gemini 3.1 Flash TTS is Google’s low-latency text-to-speech preview model with natural outputs, steerable prompts and expressive audio tags for narration control. Its verified context or usage limit is 8192 input tokens, with 16384 audio tokens maximum output.

Gemini 3.1 Flash TTS pricing and access

Gemini 3.1 Flash TTS has a free tier. Paid pricing is $1/M text input tokens and $20/M audio output tokens. Batch pricing is $0.50/M text input and $10/M audio output.

Gemini 3.1 Flash TTS best uses

Narration, Voiceovers, Audiobooks, Assistive speech, Conversational audio generation.

Gemini 3.1 Flash TTS limitations

8K input context, No function calling, Generated audio should be reviewed for pronunciation and style.

Gemini 3.1 Flash TTS capabilities and use cases

In addition, its main capabilities include Low-latency TTS, Expressive audio tags, Steerable narration, Multilinguality and Batch API. For example, common use cases include Voiceovers, Podcasts, Narration, Accessibility and Speech generation.

Who should consider Gemini 3.1 Flash TTS?

In practice, this model may suit Narration, Voiceovers, Audiobooks, Assistive speech and Conversational audio generation. Also, notable strengths include Natural controllable speech, Free tier, Batch support and Simple text-to-audio workflow. However, review trade-offs such as 8K input context, No function calling and Generated audio should be reviewed for pronunciation and style before adopting it.

Gemini 3.1 Flash TTS pricing and access

Meanwhile, Gemini 3.1 Flash TTS has a free tier. Paid pricing is $1/M text input tokens and $20/M audio output tokens. Batch pricing is $0.50/M text input and $10/M audio output. Free tier available; paid standard pricing is $1/M text input and $20/M audio output.

Official resources and verification

Use the official model website, official documentation, pricing or release source and additional primary source to confirm current availability, limits and pricing. Product details can change after publication, so rely on primary documentation for final decisions.

Compare with other AI models

Next, continue your research in the AI models directory, Google models and Text to Speech models. Compare providers, pricing, modalities and practical limitations side by side to choose the right model for your workflow.

Get started

How to use this model

  1. Create a Gemini API key.
  2. Call gemini-3.1-flash-tts-preview.
  3. Provide the text and desired speaking style.
  4. Use expressive audio tags where appropriate.
  5. Generate and review the audio output.
Copy and try

Example prompts

  • Read this script in a warm professional voice.
  • Narrate this passage with controlled pauses and emphasis.
  • Generate expressive speech using the requested delivery style.
Capabilities

What it can do

  • Low-latency TTS
  • Expressive audio tags
  • Steerable narration
  • Multilinguality
  • Batch API
Best for

Practical use cases

  • Voiceovers
  • Podcasts
  • Narration
  • Accessibility
  • Speech generation
Pricing

What does it cost?

Gemini 3.1 Flash TTS has a free tier. Paid pricing is $1/M text input tokens and $20/M audio output tokens. Batch pricing is $0.50/M text input and $10/M audio output.

Input$1.00 / 1M text tokens
Output$20 / 1M audio tokens
Simple summaryFree tier available; paid standard pricing is $1/M text input and $20/M audio output.

What stands out

  • Natural controllable speech
  • Free tier
  • Batch support
  • Simple text-to-audio workflow

Things to consider

  • Preview status
  • No tool use
  • No realtime Live API
Limitations

Important restrictions and trade-offs

  • 8K input context
  • No function calling
  • Generated audio should be reviewed for pronunciation and style
SimplifyAITools verdict

Our editorial take

A practical high-demand speech model page for developers comparing modern Gemini TTS with ElevenLabs and other voice APIs.

References

Primary sources

  1. Open source 1 ↗
  2. Open source 2 ↗
  3. Open source 3 ↗