Google

Gemini 3.1 Flash TTS Preview

gemini-3.1-flash-tts-preview

Low-latency speech generation guided by steerable prompts and expressive audio tags.

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

8K context8K context
Released2026-04-15
Relays4 sites
audiofast

Model information

Model ID
gemini-3.1-flash-tts-preview
Context
8.2K
Max input
-
Max output
16.4K
Knowledge cutoff
2025-01
Open weights
Not supported
License
-
Release date
2026-04-15

Input

Text: SupportedImage: Not supportedAudio: Not supportedVideo: Not supportedPDF: Not supportedFile: Not supported

Output

Text: Not supportedImage: Not supportedAudio: SupportedVideo: Not supported

API capabilities

Reasoning: Not supportedTool call: Not supportedStructured output: UnknownTemperature: Supported

Google Official Pricing

CNY
Updated: 2026-10-04T22:55:11.423+08:00

Input

~¥6.686/ 1M tokens

Output

~¥133.722/ 1M tokens

Relay Comparison

Compare token, per-request, or per-second pricing by relay channel.

How should Gemini 3.1 Flash TTS Preview relay pricing be compared?

This Gemini 3.1 Flash TTS Preview pricing page compares official pricing with public prices from 4 listed AI gateways. Token prices are shown in CNY per 1M tokens, while per-request, per-second, and per-character rows use the unit shown in the table. Last updated: 11/08/2026, 08:14.

Data sources
Public price catalogs, official pricing records, and monitoring results.
Metric definitions
Uptime means successful probe response rate, fake-rate signals possible model mismatch or abnormal output risk, and latency is average API response time.
Risk note
Relay gateways are third-party services. Pricing, billing, privacy, and stability can change; start with a small top-up and verify reliability before continued use.