GPT-5.5 'Secret Sauce' Is Simplified Thinking Mode — 209-Upvote Community Debate

r/LocalLLaMA·medium signal

A highly discussed post on r/LocalLLaMA (209 upvotes, 118 comments) claims GPT-5.5's improved performance comes from using a simplified, almost 'caveman mode' internal chain-of-thought — stripping reasoning down to basic, direct logic rather than verbose multi-step chains. The community debates whether simpler reasoning chains actually produce better outputs, with some arguing this mirrors findings in open-source models where shorter, more direct thinking tokens outperform elaborate reasoning traces.