Job-seekers are also guilty of this type of thing. I interviewed a candidate for a cyber security position, and it became painfully clear by the end that I was just talking to a ChatGPT proxy the entire time. He wouldn't remember key concepts or technologies when asked, only to "remember" a few minutes later and give a stellar response to the original question. It's an AI arms race... I'm inclined to just regress back to in-person interviews, paper resumes delivered by-hand, etc.

This is true. But it's a chicken-and-egg problem now. I would have never thought to use a ChatGPT proxy, but if my future job searches are going to be plagued by AI interviewers, maybe it only makes sense that I start fighting fire with fire to save myself time and sanity.

What that actually an interview, or just a screening?

Someone like that should be knocked out at the screening stage. Assuming this was an interview, you need to send feedback up the chain that this kind of candidate should be filtered out quickly.