Don't assume that because detection tools are flaky, you're in the clear - that's a gamble that's cost people their degrees. Universities might not catch you on the first essay, but they're building institutional memory. Once they have a few semesters of baseline writing samples from you, inconsistencies become glaring. A prof who's read your clumsy midterm suddenly sees a polished final paper with zero voice? Red flag. Beyond the technical detection angle, most schools now ask students to submit their drafts, process notes, or even explain their argument in a followup conversation. That's honestly the part that trips people up more than any AI detector ever could.
The practical thing nobody mentions is that detection is fastest when it's behavioral rather than algorithmic. Universities are starting to flag patterns - like sudden jumps in grade on assignments where AI use is hardest to verify, or students who can't discuss their own paper in office hours. Some schools are also just going with honor codes that ask you to declare AI usage upfront, which shifts the whole dynamic. You're not sneaking anything; you're either using it transparently (often allowed for brainstorming or editing) or you're not. That clarity actually reduces the punishment surface because the school isn't trying to play detective.
As for what happens if you get caught? Depends on the institution and the context. A failed assignment is the softest outcome. Failing the entire course is common. Expulsion happens, but usually only if it's repeat offenses or part of a broader pattern. Most places still treat a first genuine slip-up more leniently than serial cheating. The real punishment isn't always what's written in the handbook though - it's the academic probation, the notation on your transcript, or the hit to your graduate school applications.