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 →OpenAI: GPT-5.6 Sol Pro vs Anthropic: Claude Opus Latest
OpenAI: GPT-5.6 Sol Pro and Anthropic: Claude Opus Latest are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
This model always redirects to the latest model in the Claude Opus family.
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5.6 Sol Pro | Anthropic: Claude Opus Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.1M | 1M | 🏆 OpenAI: GPT-5.6 Sol Pro |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $5.00 | $5.00 | Tie |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $30.00 | $25.00 | 🏆 Anthropic: Claude Opus Latest |
| 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 OpenAI: GPT-5.6 Sol Pro better than Anthropic: Claude Opus Latest?
OpenAI: GPT-5.6 Sol Pro and Anthropic: Claude Opus Latest are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between OpenAI: GPT-5.6 Sol Pro and Anthropic: Claude Opus Latest?
Input: $5.00 vs $5.00 per 1M tokens. Output: $30.00 vs $25.00 per 1M tokens.
What context windows do OpenAI: GPT-5.6 Sol Pro and Anthropic: Claude Opus Latest support?
OpenAI: GPT-5.6 Sol Pro supports up to 1.1M tokens. Anthropic: Claude Opus Latest supports up to 1M tokens.
Do both OpenAI: GPT-5.6 Sol Pro and Anthropic: Claude Opus Latest support tool calling?
OpenAI: GPT-5.6 Sol Pro: yes. Anthropic: Claude Opus Latest: yes.
Compare OpenAI: GPT-5.6 Sol Pro with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest