Gemini 2.5 Pro is Google’s state-of-the-art AI model designed for advanced reasoning, coding, mathematics, and scientific tasks. It employs “thinking” capabilities, enabling it to reason through responses with enhanced accuracy...
Model details →Google: Gemini 2.5 Pro vs OpenAI: GPT-5.6 Sol Pro
Google: Gemini 2.5 Pro and OpenAI: GPT-5.6 Sol Pro are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
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 2.5 Pro | 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. | $1.25 | $2.00 | 🏆 Google: Gemini 2.5 Pro |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $10.00 | $10.00 | Tie |
| 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 2.5 Pro better than OpenAI: GPT-5.6 Sol Pro?
Google: Gemini 2.5 Pro and OpenAI: GPT-5.6 Sol Pro are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between Google: Gemini 2.5 Pro and OpenAI: GPT-5.6 Sol Pro?
Input: $1.25 vs $2.00 per 1M tokens. Output: $10.00 vs $10.00 per 1M tokens.
What context windows do Google: Gemini 2.5 Pro and OpenAI: GPT-5.6 Sol Pro support?
Google: Gemini 2.5 Pro supports up to 1.0M tokens. OpenAI: GPT-5.6 Sol Pro supports up to 1.1M tokens.
Do both Google: Gemini 2.5 Pro and OpenAI: GPT-5.6 Sol Pro support tool calling?
Google: Gemini 2.5 Pro: yes. OpenAI: GPT-5.6 Sol Pro: yes.