Why when I'm not logged in, ChatGPT writes me very good, long replies but when I log in, suddenly it gets short and bad?

I don't use ChatGPT that often but I noticed something. When I'm somewhere not logged in and ask Chat to help me with something it always gives me these long detailed answers. When it comes to creative writing assistance, it's also great. Very, very long replies (around 10k word each). Long descriptive paragraphs, interesting and creative stories. But when I type in the exact prompt on my account, the stories are short, paragraphs are short. It feels like it's going exactly what I wrote. Doesn't add any descriptions.