I tried Claude recently (after they dropped the nonsensical requirement to give them your phone number) and I was surprised to see how significantly less sycophant it was. Chatgpt, unless you are talking hard science, tends to be overly agreeable. Claude questions you a lot (you ask for x and it asks you stuff like: why are you interested in x, or based on our previous convo, x might not be suitable to you, or I see your point but based on our previous convo, y is better than x, etc). Chatgpt rarely does that.

Of course, also OpenAI being ran by openly questionable people while Dario so far doesn't seem nowhere near as bad even if none of them are angels.