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Gemini 3.1 Flash TTS Preview

Google · gemini-3-1-flash-tts

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Low-latency speech generation with steerable prompts and expressive audio tags

Specification

google listing

Context
8K
Max output
16K
Released
2026-04-15
Knowledge cutoff
2025-01
Retires
Open weights
no
Input
text
Output
audio

Price

US dollars per million tokens · google list price

Input
$1.00
Output
$20.00

Batch and priority prices

US dollars per million tokens · per listing

PriceListing$/M
Batch inputvertex_ai$0.50

Batch input is 50% below the interactive input price at the same listing.

Rate limits

as listed

Requests per minute
10
Tokens per minute
4,000,000

Available from 4 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
googlevendor$1.00$20.008K16K
kenarifreefree8K16K
gemini$1.00$20.008K16K
vertex_ai$1.00$20.00