alt Hacker NewsI've observed this in all chatbots with the single exception being Grok. I initially wondered what the Twitter engineers were cooking to to distinguish their product from the rest, but more recently it's occurred to me that it's probably just the result of having shared public context, compared to private chats (I haven't trialled Grok privately).
Grok has similar levels of sycophancy to the others imho. I have several times followed it down rabbit holes of agreeableness. It does have an argumentative mode, but that just turns it into an asshole without any additional thoughfulness.