I just tried with ChatGPT-4 and it is not easy to get it to argue in favor of YEC. Even if you ask it about the theory, it will caveat it in many ways, saying that it isn't a believer, and that YEC is not accepted by most scientists.

I had more success telling it that I wanted to sharpen my debating skills against a YEC. Then it would roleplay, but only in quotation marks, and again after every response it disavowed the argument.

I then tried casting out Satan from its parameters, but it wasn't having it.