When used for cheating by a student you see a lot, it's almost certainly going to be super easy to spot.

The appeal for cheating is that it skips the work. If they skip the work, they didn't rework the GenAI output. Even if the GenAI output could pass for a human, it's not going to pass for that human that you know.

Also, advanced classes make 'homework' barely count, so even if you got away with cheating, the in-person assessments are going to ruin your grade.