Send us Fan Mail Find out more Highlights * A University of Cambridge study found that top AI models like Claude and ChatGPT matched human degree classifications only about 50% of the time when grading university essays. * AI consistently undervalued top-tier work and overvalued lowest-ranked essays, exhibiting a "central tendency bias" by assigning middling marks to most submissions. * AI systems were overly sensitive to linguistic features like essay length, vocabulary variation, and...