The headline kind of misses the main point, which is that the students have to retake the exam because cheating was so rampant, likely due to AI usage but that can't be proven.
Between 2021 and 2025, 3.5 percent of test takers scored 100 or more on the 120-question UNAM test. This year, 16.3 percent did so.
The story was even worse at the highest of the high end. Between 2021 and 2025, 0.9 percent of test takers scored 110 or more; this year, 5.5 percent did so.