墨西哥最大的国立自治大学（UNAM）宣布约58000名学生必须重新参加入学考试[1]。这一决定源于该校首次举办的远程在线入学考试中出现异常高分率，引发大规模作弊嫌疑[1]。近160000名学生参加了今年夏季的入学考试[1]，其中满分100或以上的考生比例从2021至2025年的历年平均3.5%激增至16%[1]。在竞争激烈的医学项目中，这一比例更是高达30%，而去年仅为9%[1]。
大学已取消了2%的成绩，共3174场考试，原因是检测到身份冒充、外部协助和人工智能使用等不规范行为[1]。技术专家认为约75000场考试（将近一半）可能涉及某种程度的作弊[1]。尽管该校原本采用了AI驱动的网络摄像头进行面部识别和语音识别以防止作弊，但结果表明这些防作弊措施未能有效运作[1]。
大学校长莱昂纳多·洛梅利表示："UNAM是科学、人文和理解的家园，知道如何认识错误并自我纠正"[1]。重新安排的入学考试将于2025年8月31日开始，而非原定的8月10日[1]。墨西哥总统克劳迪亚·谢因鲍姆表示，如果犯罪成立应由检察官处理[1]。
Mexico's National Autonomous University (UNAM), the country's largest academic institution, has mandated approximately 58,000 students to resit their entrance examination following widespread evidence of irregularities in the initial online test.[1] The decision came after technical specialists identified suspicious patterns suggesting that nearly half of the roughly 160,000 students who sat for the summer admission exam may have engaged in some form of cheating.[1]
The anomalies became apparent when the proportion of test-takers scoring 100 points or above surged to 16 percent, a dramatic increase from the historical average of 3.5 percent between 2021 and 2025.[1] The spike was particularly pronounced in the medicine program, where 30 percent of candidates achieved perfect or above-perfect scores compared to just 9 percent the previous year.[1] Although UNAM had implemented artificial intelligence-powered facial recognition and voice identification systems through webcams to prevent cheating, these safeguards failed to effectively detect the irregularities.[1] The university subsequently annulled 2 percent of the results, equivalent to 3,174 exams, after detecting instances of identity fraud, external assistance, and artificial intelligence usage.[1]
University rector Leonardo Lomelí stated that "UNAM is the home of science, the humanities, and understanding, and it knows how to recognize mistakes and correct itself."[1] The rescheduled entrance examination has been set to begin on August 31, 2025, rather than the originally planned date of August 10.[1] Mexico's President Claudia Sheinbaum indicated that if criminal activity were proven, the matter should be handled by prosecutors.[1]