katero
Jul 01, 2026

'Fraud Is Overwhelming': Brown U. Professor Blasts Students Cheating with AI

‘Fraud Is Overwhelming’: Brown U. Professor Blasts Students Cheating with AI

Student lets AI do his homework
demaerre/Getty
Lucas Nolan1 Jul 2026

A Brown University economics professor who modified his exam format to accommodate students traumatized by a campus shooting uncovered what may be the largest AI-assisted cheating scandal in Ivy League history.

Fortune reports that Roberto Serrano, who holds the Harrison S. Kravis University Professorship in Economics at Brown University, made a compassionate decision last spring that led to an unexpected discovery about the AI cheating epidemic in higher education. After a campus shooting left two students dead and nine wounded, including members of his class, Serrano switched his advanced mathematical economics course to a take-home format to reduce stress for traumatized students.

The March 5 take-home midterm for ECON 1170, designed as a closed-book take home test, produced results that immediately raised red flags. Of the 86 students who took the exam, 40 received perfect scores of 100. The class average reached 96, dramatically higher than the typical range of 65 to 80 in previous years — despite Serrano intentionally making the exam more challenging than usual.

The evidence of AI assistance became clear when Serrano and his grading team noticed unusual patterns in answers. “Some answers contained unusual passages that coincided with results obtained after running the questions through ChatGPT,” he explained. When they tested the questions through ChatGPT, they found the AI had generated a convoluted argument for a problem with a straightforward answer. That same complex reasoning appeared across dozens of submissions.
Wynton Hall Code Red cover

Rather than immediately voiding the results, Serrano gave students a chance to prove themselves. He announced the final would be administered in person, and if the grade distribution did not roughly mirror the midterm, only the final would count.

In a later session, he confronted his students directly. “If you did this, if you just press a button to ask an AI agent to do this for you, you’re showing to be completely irrelevant. So my question to you is, why are you here?” The classroom response was silence, and Serrano suspected many of the cheaters were not even present.

The aftermath proved revealing. Following his speech, 27 students dropped the course, 22 of them having scored perfect 100s on the take-home exam. When the in-person final took place, only 59 students appeared, and 19 failed. The class average plummeted to 48 out of 100, the lowest final exam average in the course’s history.

“When you put together all this information and the distributions of the two exams, it’s absolutely clear,” Serrano said. “The empirical evidence of fraud is overwhelming.”

Other posts