I don't think either of these are the best choices for this. Chatgpt 5.2 pro and gemini 3 pro deep thinking I believe are the strongest LLMs at "pure thought",

I don't think either of these are the best choices for this. Chatgpt 5.2 pro and gemini 3 pro deep thinking I believe are the strongest LLMs at "pure thought", i.e. things like mathematical reasoning.