I gave it (GPT4 Turbo) a block of text to decode with no clues as to the cipher or anything... it wasn't anything challenging (just ROT13) but it identified the

I gave it (GPT4 Turbo) a block of text to decode with no clues as to the cipher or anything... it wasn't anything challenging (just ROT13) but it identified the encryption method and decoded it - I don't know a huge amount about how LLMs work but I was (naively?) impressed!