Think Harder, See Less? What Visual Illusions Reveal About Multimodal Reasoning
TL;DR for operators Giving a vision-language model more time to reason sounds like a reliability upgrade. On deceptive visual tasks, that assumption is too broad. Across seven model configurations tested with and without additional deliberation, longer reasoning improved free-form explanations of why an illusion occurs, yet detection accuracy fell for several Qwen models and multiple-choice reasoning fell for several open-source systems. ...