Text to speech / Google

Gemini 3.1 Flash TTS (preview)

Gemini 3.1 Flash TTS (preview) is a text-to-speech model from Google, available through the Impossibl API. The advertised input rate is $1.00 per million input tokens. The advertised output rate is $20.00 per million output tokens.

api id: google/gemini-3.1-flash-tts-preview

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how much does gemini 3.1 flash tts (preview) cost?

published base api rates · usd per 1m tokens

input
$1.00
output
$20.00

rates are published by the impossibl api. balance-purchase fees, taxes, tool charges, and workspace-specific pricing are separate.

specifications & capabilities

creator
Google
model type
Text to speech
context window
not published
maximum output
not published in the catalog
input types
text
output types
audio
tool calling
not verified in the catalog

unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports.

available voices

Zephyr, Puck, Charon, Kore, Fenrir, Leda, Orus, Aoede, Callirrhoe, Autonoe, Enceladus, Iapetus, Umbriel, Algieba, Despina, Erinome, Algenib, Rasalgethi, Laomedeia, Achernar, Alnilam, Schedar, Gacrux, Pulcherrima, Achird, Zubenelgenubi, Vindemiatrix, Sadachbia, Sadaltager, Sulafat

published endpoint

/v1/audio/speech

see the model documentation for integration details.

independent benchmarks

Benchmark results are not available for this model yet.

frequently asked questions

What is Gemini 3.1 Flash TTS (preview)?

Gemini 3.1 Flash TTS (preview) is a text-to-speech model from Google, available through the Impossibl API.

How much does Gemini 3.1 Flash TTS (preview) cost?

Gemini 3.1 Flash TTS (preview) costs $1.00 per million input tokens and $20.00 per million output tokens through the Impossibl API. All rates are in USD.

view the pricing table ↑

What inputs and outputs does Gemini 3.1 Flash TTS (preview) support?

Gemini 3.1 Flash TTS (preview) accepts text as input. Gemini 3.1 Flash TTS (preview) returns audio. Available voices include Zephyr, Puck, Charon, Kore, Fenrir, Leda, Orus, Aoede, Callirrhoe, Autonoe, Enceladus, Iapetus, Umbriel, Algieba, Despina, Erinome, Algenib, Rasalgethi, Laomedeia, Achernar, Alnilam, Schedar, Gacrux, Pulcherrima, Achird, Zubenelgenubi, Vindemiatrix, Sadachbia, Sadaltager, and Sulafat.

How do I use Gemini 3.1 Flash TTS (preview) through an API?

Gemini 3.1 Flash TTS (preview) is available through the Impossibl API. Use google/gemini-3.1-flash-tts-preview as the model identifier with /v1/audio/speech. The quickstart explains how to create an API key and send your first request.

follow the api quickstart →

When was Gemini 3.1 Flash TTS (preview) released?

Google released Gemini 3.1 Flash TTS (preview) on April 15, 2026.

sources & coverage

this page describes Gemini 3.1 Flash TTS (preview) as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes.

view the source catalog ↗

model descriptions and release dates, where available, use the creator sources linked in the faq. api prices and limits use the impossibl catalog. benchmark results, where available, are credited to Artificial Analysis in the benchmarks section. report a correction →