Diagnostic Performance of ChatGPT‐4o and DeepSeek‐3 Differential Diagnosis of Complex Oral Lesions: A Multimodal Imaging and Case Difficulty Analysis

Remarkably, the text-only DeepSeek-3 model exceeded the diagnostic performance of the multimodal ChatGPT-4o model for complex oral lesions, highlighting its structured reasoning capabilities and reduced hallucination rate. These findings underscore the potential of non-vision LLMs in diagnostic support, emphasizing the critical need for expert oversight in complex scenarios.