Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation.…
Model details →Google: Gemini 3.1 Pro Preview vs Auto Router (Beta)
Auto Router (Beta) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
Auto Router (Beta) is a task-aware router from OpenRouter. It classifies each request, then routes it the [most popular model](/rankings#task-spend) for that task based on aggregate spend, filtered by your...
Model details →Side-by-side comparison
| Capability | Google: Gemini 3.1 Pro Preview | Auto Router (Beta) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 2M | 🏆 Auto Router (Beta) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $-1000000.00 | 🏆 Auto Router (Beta) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $-1000000.00 | 🏆 Auto Router (Beta) |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Google: Gemini 3.1 Pro Preview better than Auto Router (Beta)?
Auto Router (Beta) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Google: Gemini 3.1 Pro Preview and Auto Router (Beta)?
Input: $2.00 vs $-1000000.00 per 1M tokens. Output: $12.00 vs $-1000000.00 per 1M tokens.
What context windows do Google: Gemini 3.1 Pro Preview and Auto Router (Beta) support?
Google: Gemini 3.1 Pro Preview supports up to 1.0M tokens. Auto Router (Beta) supports up to 2M tokens.
Do both Google: Gemini 3.1 Pro Preview and Auto Router (Beta) support tool calling?
Google: Gemini 3.1 Pro Preview: yes. Auto Router (Beta): yes.
Compare Google: Gemini 3.1 Pro Preview with other models
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