Paper reveals reasoning models' 'thinking' behaviors are often uncorrelated with correct answers
Jeande_d · x · 2026-08-27
A new paper investigates the behaviors of reasoning models as they output long chains of thought spanning thousands of tokens. While these models often outperform their instruct counterparts in accuracy and exhibit behaviors like self-correction and hypothesis testing, the study finds that these 'thinking' behaviors are largely uncorrelated with correct answers. The paper challenges the assumption that chain-of-thought amplifies the reasoning behaviors most associated with correctness, highlighting the limitations of current accuracy metrics in capturing failure modes during reasoning.
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