I regularly use ChatGPT to generate questions for junior high worksheets. You would be surprised how easily it fucks up "generate 20 multiple choice and 10 short answer questions". Most frequently at about 12-13 multiple choice it gives up and moves on. When I point out its flaw and ask it to finish generating the multiple choice, it continues to find new and unique ways to fuck up coming up with the remaining questions.
I would say it gives me simple count and recall errors in about 60% of my attempts to use it.