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Gemini 3.1 Flash TTS — and what?

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 1 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

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Gemini 3.1 Flash TTS
google/gemini-3.1-flash-tts
Provider
Google
Family
Gemini 3
Modality
audio-tts
Context window
Max output
Released
2026-05-22
License
Proprietary
Per 1K chars
$0.0000 /1K ch
Tools
yes
Streaming
Vision
yes
JSON mode
yes
Reasoning
Prompt caching
Batch API
Try it
View model →
Gemini 3.1 Flash TTS
google/gemini-3.1-flash-tts
Full spec →

Newest audio model from Google introduces granular audio tags that give you precise control to direct AI speech for expressive audio generation.

Strengths
  • Natural speech synthesis
Use cases
VoiceoversIVRAudiobooks