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Gemini 3.1 Flash TTS Preview benchmarks, pricing and specs

Gemini 3.1 Flash TTS Preview is a Google model released on April 15, 2026 that takes text input and produces audio. It costs $1 per 1M input tokens and accepts up to 8,192 tokens of context.

Per 1M input tokens
$1
Context window
8K

Data verified October 11, 2026 · Dataset 2026-10-12

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Key facts

Provider
Google
Model family
Gemini 3.1
Release date
April 15, 2026
Status
Current
Access
API only
API model id
Not reported
Context window
8,192 tokens
Max output
16,384 tokens
Input
text
Output
audio
Task families
audio
Declared capabilities
text to speech

Gemini 3.1 Flash TTS Preview pricing

It is the #4 cheapest of 8 current audio models priced per 1M input tokens.

UnitPrice (USD)TierAppliesSource
1M input tokens$1standardCurrent
1M output tokens$20standardCurrent
1M input tokensNot reportedcachedCurrent

Independent benchmark results

Scores come from independent evaluators that ran the model themselves, pinned to a dated snapshot. Rank is among current models in the same snapshot. Google's own launch figures are listed under strengths with the publisher named, because they are not measured the same way.

No independent benchmark has published a result for Gemini 3.1 Flash TTS Preview yet. It is still compared below on price, context and capabilities.

Strengths, cautions and best uses

Strengths

  • Google documents low-latency, controllable speech generation with expressive audio tags

Cautions

  • This preview endpoint may change before becoming stable and has more restrictive rate limits

Best for

  • Controllable text-to-speech generation

Alternatives to Gemini 3.1 Flash TTS Preview

The closest current audiomodels by price. The cheapest model that scores as well or better is listed first; failing that, the cheapest one within 3% of the benchmark's scale.

Other Gemini 3.1 models

Gemini 3.1 Flash TTS Preview FAQ

How much does Gemini 3.1 Flash TTS Preview cost?

Gemini 3.1 Flash TTS Preview costs $1 per 1M input tokens at the standard tier. It is the #4 cheapest of 8 current audio models priced per 1M input tokens. Source: Google, verified October 11, 2026.

What is the context window of Gemini 3.1 Flash TTS Preview?

Gemini 3.1 Flash TTS Preview accepts up to 8,192 tokens of context. It can return up to 16,384 tokens in one response. That ranks #7 of 7 current audio models by context length.

Is Gemini 3.1 Flash TTS Preview open source or API only?

Gemini 3.1 Flash TTS Preview is available through Google's API only; its weights are not published.

What are the best alternatives to Gemini 3.1 Flash TTS Preview?

The closest current alternatives by price and measured performance are Gemini 3.8 Flash TTS (50% cheaper per 1M input tokens, $0.50 vs $1), Gemini 3.8 Flash-Lite TTS (50% cheaper per 1M input tokens, $0.50 vs $1), GPT-4o Transcribe (2.5x the price per 1M input tokens, $2.50 vs $1) and gpt-audio-1.5 (2.5x the price per 1M input tokens, $2.50 vs $1).

Sources

Cite this page

Van Data Team. "Gemini 3.1 Flash TTS Preview Benchmarks, Pricing and Specs." AI Model Benchmark Dataset 2026-10-12. https://vandatateam.com/ai-model-benchmarks/gemini-3-1-flash-tts-preview

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