I issued a registered warning for AI usage for him. Other moderators can also make other actions for this case if needed. 
Thanks! +karma
Thanks for that Jokers!
As I can see, the thread still exists. Maybe because I did not report the thread using the report to moderator button. Should I report the thread using the report to moderator button? Moreover, this guy has several other threads that are created using AI. Should I report these threads too? Do I have to provide detailed information? For example, I have provided the proof that this thread is generated using AI, should I check all those threads using AI detector tools and gather the proof first before reporting those threads? Or is it enough if I just use the report to moderator button?
Yes, I didn't delete the topic and other topics, I just locked those ones which don't have any active discussions at the moment.
It is not needed to report posts via report button additionally, moderators will do some work after they see the post in this topic. You can also use a report button if you want, moderators of that section and global ones will see the report either.
I wrote what I have done so that other moderators when they'll look at this case knew what is already done and can make additional things if they think it is needed. So probably some additional measures can be done by some other moderator.
When you see multiple violations, it is good to mention all of them in the post where you inform about them.