Grading homework with AI is an idiotic and destructive idea, just saying. "AI" may be able to see superficial similarities between the work to grade and a well-written text, but it won't (in its current state) be able to distinguish gibberish from a good argument. And what does it feel like to pour your heart into something, then have it graded by a machine that doesn't understand because your teacher can't be bothered to even give it a good read?