GPT-5.6 Sol Pro

openai/gpt-5.6-sol-pro

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://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

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Context window: 1.1M
Input: Document · Image · Text
Output: Text
Released: 2026-07-09

Max output: 128K
Knowledge cutoff: 2026-02-16
Weights: Closed
Capabilities: Reasoning, Tool call, Structured

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ModelRegistry · Catalog updated 2026-10-12