Gemini 3.1 Pro Preview
- Input / 1M
- $2.1
- Output / 1M
- $12.6
- Context
- 1,000,000 tokens
- Catalog
- Gateway catalog
About this model
This model improves upon Gemini 2.5 Pro and is catered towards challenging tasks, especially those involving complex reasoning or agentic workflows. Improvements highlighted include use cases for coding, multi-step function calling, planning, reasoning, deep knowledge tasks, and instruction following.
Use an endpoint supported by this model.
Get a key for this setup →const response = await fetch('https://api.minirouter.sh/v1/chat/completions', { method: 'POST', headers: { Authorization: `Bearer ${process.env.MINIROUTER_KEY}`, 'Content-Type': 'application/json', }, body: JSON.stringify({ model: 'google/gemini-3.1-pro-preview', messages: [{ role: 'user', content: 'Why is the sky blue?' }], max_tokens: 1024, }),}) const data = await response.json()console.log(data.choices[0].message.content)Overview
- Model type
- language
- Context window
- 1,000,000
- Maximum output
- 64,000
- Input / 1M tokens
- $2.1
- Output / 1M tokens
- $12.6
- Released
- 2026-02-19
Prices include the MiniRouter fee. Compatibility snapshot: 2026-08-06. Input: text, image, pdf. Output: text.
Endpoints
/v1/chat/completions/v1/messages/v1/responsesPlatform-funded routing only. Caller BYOK credentials and OIDC-based upstream authentication are intentionally excluded; authenticate with a MiniRouter bearer key.
Captured parameters: max_tokens, temperature, stop, tools, tool_choice, reasoning, include_reasoning, response_format, structured_outputs.
Structured output: JSON Schema and JSON mode enforced on verified providers. How it works
API
Use the setup panel above to switch between Chat Completions, Messages, and client configurations. Every snippet keeps the model ID unchanged.
https://api.minirouter.sh/v1google/gemini-3.1-pro-previewProviders
MiniRouter selects from the configured routes below. Priority is the catalog order, not a latency or availability score.
| Provider | Priority | Input / 1M | Output / 1M | Parameters | Access |
|---|---|---|---|---|---|
vercel | 1 | $2.1 | $12.6 | max_tokens, temperature, stop, tools, tool_choice, reasoning, include_reasoning, response_format, structured_outputs | MiniRouter balance |