Not programming, but I asked it to generate a list of words that end in common tlds, to see if I could come up with a nice website domain / project name. I said give me words that end in .io, .ws, .is etc.
It failed to follow this simple instruction. I tried to be more and more specific, but no matter what I did it returned words that did not end with the tlds I asked for. it just seemed to give me any old words and throw a . two places before the end.
Compared to the initial experiences I had with ChatGPT it feels like it's suddenly gotten awfully dumb.