# Gemini 3.1 Pro

> Gemini 3.1 Pro — Google 旗舰,数学推理与代码顶级。

Canonical: https://routemux.com/zh/google/gemini-3.1-pro-preview
Provider: Google

## Key facts

| Field | Value |
| --- | --- |
| Model ID | google/gemini-3.1-pro-preview |
| Official model ID | gemini-3.1-pro-preview |
| Context window | 1M |
| Max output | 66K |
| Input modalities | text, image, audio, video |
| Output modalities | text |
| Capabilities | Vision, Reasoning, Tool Calling, Json Mode, Coding |
| Availability | available |

## Pricing

- RouteMux input: $0.6 per 1M tokens
- RouteMux output: $3.6 per 1M tokens
- Official input: $2 per 1M tokens
- Official output: $12 per 1M tokens
- Cache read: $0.06 per 1M tokens
- Saving vs official: 70%
- Official price source: gemini_x0.5, verified 2026-06-08

Billing is prepaid wallet, charged per successful request only.

## API access

Base URL: https://api.routemux.com

Supported protocols:

- openai_chat

Aliases that also route here: models/gemini-3.1-pro-preview

## Other variants in this family

- Gemini 3.1 Flash Lite (`google/gemini-3.1-flash-lite`)