Long context

gemini-3.1-pro-preview

Google's Gemini series — very long context windows and strong multimodal input.

Model IDgoogle/gemini-3.1-pro-preview

ChatStreamingTool callingVision

Try it Quick Start

Call summary

Input

$8.57$6.00/ 1M tokens

Cache write $6.00

Output

$25.71$18.00/ 1M tokens

Cache read $6.00

Context Window

1.05M

Max output

N/A

API Endpoints

Available Configurations

Production reliability

Privacy-safe aggregates from real Router One model calls, so you can assess stability and response latency before integrating.

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API Endpoints

One API key — call this model through any of the endpoints below.

POST/v1/chat/completionsOpenAI-compatible · Works for every model

Docs

Integration

The same API key works across every endpoint below.

Endpoint

/v1/chat/completions

Model ID

google/gemini-3.1-pro-preview

Routing mode

auto

Request example

bash

curl -X POST \
  https://api.router.one/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "google/gemini-3.1-pro-preview",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

Get API Key