I just spent 20 minutes getting the current iteration of ChatGPT to agree with me that a certain sentence is palindromic. Even when you make it print the unaccented characters one by one, spaces excluded, backwards and forwards, it still insists "Élu par cette crapule" isn't palindromic.
I understand how tokenization makes this difficult but come on... this doesn't feel like a difficult task for something that supposedly passes the LSATs and whatnot.
* French for "Elected by this piece of shit"