Thinking-mode VLMs collapse answer-token entropy, but thinking-chain entropy and length serve as robust, zero-cost hallucination predictors.
arXiv preprint arXiv:2510.01581 , year=
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When Thinking Hurts: Epistemic Signals in the Reasoning Chains of Visual Language Models
Thinking-mode VLMs collapse answer-token entropy, but thinking-chain entropy and length serve as robust, zero-cost hallucination predictors.