Ask HN: Is someone testing AI bots in comments?

I've noticed in several threads today there will be two or three comments that are quite obviously AI-generated; providing a definition in a slightly out of context way, summarizing two of three nearby comments, and other easy to generate stuff. I've noticed there will be a cluster of them on a given thread/post, all posting from old accounts. They tend to get quickly flagged and then disappear, so I'm not able to link to them.