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UNAM cancels thousands of admission exam scores and requires retakes after detecting widespread cheating in AI-proctored remote exam

Incident Provisional 92% confidence first seen

Mexico's National Autonomous University (UNAM) invalidated thousands of admission exam scores after detecting an unusual spike in perfect scores during its first online exam administration with AI-powered proctoring in 2025. The investigation found the perfect score rate jumped from 0.9% to 5.5%, with evidence of students using phones, accomplices, and other cheating methods. Approximately 58,000 applicants must now retake the exam in person.

UNAM AI-powered webcam proctoring ChatGPT

Source coverage

Mexico's Top University Cancelled Thousands of Exam Scores Over Suspected AI Cheating CNN newsletter An AI-supervised remote exam went so badly that 58,000 students must retake it Ars Technica independent

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