I use the GPT models (along with Claude and Gemini) a ton for my work. And from this perspective, I appreciate GPT-5. It does a good job.
But I also used GPT-4o extensively for first-person non-fiction/adventure creation. Over time, 4o had come to be quite good at this. The force upgrade to GPT-5 has, up to this point, been a massive reduction in quality for this use case.
GPT-5 just forgets or misunderstands things or mixes up details about characters that were provided a couple of messages prior, while 4o got these details right even when they hadn't been mentioned in dozens of messages.
I'm using it for fun, yes, but not as a buddy or therapist. Just as entertainment. I'm fine with paying more for this use if I need to. And I do - right now, I'm using `chatgpt-4o-latest` via LibreChat but it's a somewhat inferior experience to the ChatGPT web UI that has access to memory and previous chats.
Not the end of the world - but a little advance notice would have been nice so I'd have had some time to prepare and test alternatives.