July 8, 2026
ChatGPT just failed the final
Suspecting AI cheating, Ivy League prof ordered in-person final; scores fell 50%
Comment section declares the take-home exam era officially over
TLDR: A Brown professor moved a final exam back in person after suspecting AI cheating, and scores dropped by roughly half. Commenters say this proves take-home exams are cooked, students are gaming the system, and the value of grades may be sliding fast.
Brown professor Roberto Serrano suspected students were leaning on artificial intelligence to get through take-home economics exams, so he brought the final back into the classroom. The result was brutal: scores reportedly fell by about 50 percent, and the comments instantly turned into a digital food fight over whether this exposed mass cheating, a broken school system, or both. The loudest reaction was pure doomposting. One commenter flatly announced, "At-home testing is dead," while others argued that grades and even fancy degrees now risk meaning a lot less if chatbot help is everywhere.
The thread also had plenty of side-eye. One reader mocked the article’s opening claim that Ivy League students are “by definition” intelligent, basically saying, absolutely not, next question. Another joked that survey numbers about how many students use AI regularly were almost certainly low because, in their words, the rest are lying. That mix of cynicism and dark humor gave the whole discussion a very “everybody knows what’s going on, but now there’s data” vibe.
Then came the real spice: some commenters treated AI cheating like a full-blown social crisis, with one even suggesting it should be punished like a crime. Others zoomed out and painted an apocalyptic picture of a generation stuck with worthless credentials and fewer entry-level jobs. In other words, this wasn’t just a campus scandal to the community—it was a referendum on whether education itself is quietly becoming one big open-book illusion
Key Points
- •Ars Technica reports that Brown University professor Roberto Serrano suspected widespread AI-assisted cheating in his economics course.
- •The article cites a Princeton survey finding that 29.9 percent of students admitted using AI to cheat on at least one exam or assignment.
- •After a December 2025 shooting on Brown’s campus, Serrano decided to allow take-home exams in his spring 2026 ECON 1170 course.
- •The course reportedly drew more students after the take-home exam format was announced.
- •When Serrano later required an in-person final, scores fell by about 50 percent, according to the article’s headline and framing.