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 OpenAI: GPT-5.6 Sol Pro
Google: Gemini 3.1 Pro Preview wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5.6 Sol Pro is the same underlying model as [GPT-5.6 Sol](https://openrouter.ai/openai/gpt-5.6-sol), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://develope…
Model details →Side-by-side comparison
| Capability | Google: Gemini 3.1 Pro Preview | OpenAI: GPT-5.6 Sol Pro | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 1.1M | 🏆 OpenAI: GPT-5.6 Sol Pro |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $2.00 | $5.00 | 🏆 Google: Gemini 3.1 Pro Preview |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $12.00 | $30.00 | 🏆 Google: Gemini 3.1 Pro Preview |
| 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 OpenAI: GPT-5.6 Sol Pro?
Google: Gemini 3.1 Pro Preview wins on 2 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 OpenAI: GPT-5.6 Sol Pro?
Input: $2.00 vs $5.00 per 1M tokens. Output: $12.00 vs $30.00 per 1M tokens.
What context windows do Google: Gemini 3.1 Pro Preview and OpenAI: GPT-5.6 Sol Pro support?
Google: Gemini 3.1 Pro Preview supports up to 1.0M tokens. OpenAI: GPT-5.6 Sol Pro supports up to 1.1M tokens.
Do both Google: Gemini 3.1 Pro Preview and OpenAI: GPT-5.6 Sol Pro support tool calling?
Google: Gemini 3.1 Pro Preview: yes. OpenAI: GPT-5.6 Sol Pro: yes.
Compare Google: Gemini 3.1 Pro Preview with other models
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