I’m not sure about accuracy, but I have noticed that it’s become quite a bit more forgetful. When GPT-4 was new, I could start talking about a technical topic, then drill down into the details and refine / expand upon the subject.

These days, it seems to be a lot more likely to forget key details from earlier in the conversation. We’re not talking about chats that are anywhere near hitting the token limit. I have to keep reminding it about things when I didn’t have to before.