Google: Gemini 3.1 Flash TTS Preview provider comparison

google/gemini-3.1-flash-tts-preview

Gemini 3.1 Flash TTS Preview is a text-to-speech model from Google, and a substantial generational step up from Gemini 2.5 Flash TTS. It takes text input and produces audio output...

Endpoints:: 1
Context:: 32.8K
Input:: text
Output:: speech

Visual comparison

Endpoint pricing chart

Compare published endpoint pricing visually.

Effective price by endpoint

USD per unit for prompt. Lower is better.

Only directly comparable published units are charted.

Server-rendered comparison

Provider endpoints

Prices are shown only in the units published by OpenRouter; cross-unit rankings are intentionally omitted. Missing speed data never removes an endpoint.

Endpoint comparison for Google: Gemini 3.1 Flash TTS Preview
Provider / route	Current pricing	Speed measurements	Endpoint details
Provider / route Google Vertex`google-vertex`	Current pricing $0.000001 per unit (prompt) $0.00002 per unit (completion)	Speed measurements 500-token response Not applicable Response starts Insufficient recent data Output speed Insufficient recent data	Endpoint details Uptime (30 min) 100.00% Context 32.8K Model format unknown Max output 16.4K 5 parameters max_tokens, response_format, seed, temperature, top_p

Endpoint data fetched Jul 15, 2026, 11:17 PM UTC.

Gemini 3.1 Flash TTS Preview deployment guide

How to choose a Gemini 3.1 Flash TTS Preview inference provider

Gemini 3.1 Flash TTS Preview is indexed here as a speech model by Google, with 1 provider endpoint from Google Vertex. The comparison preserves each exact OpenRouter routing tag so pricing and performance observations can be connected to the route an application would actually request.

Match the endpoint to the workload

The model publishes a 32.8K-token context window. It accepts text input and returns speech output. 5 distinct supported parameters appear across the listed routes. Confirm limits on the specific endpoint rather than assuming every host exposes the same configuration.

Compare speech billing units directly

At least one unit is published consistently across the listed endpoints, allowing a direct price chart for prompt. Other charges remain in the table using OpenRouter’s exact billing labels.

Verify route format and availability

Published endpoint formats include unknown. Availability, rate limits, and regional support can change independently of catalog pricing, so confirm the selected routing tag before production deployment.