Where is Chatgpt4? Why isnt't it displayed anymore?

Why cannot I select between Chatgpt3.5 and 4 anymore? Where has it gone? Not displayed in my account.

I’ve verified that I can still see GPT-4 if I select “Chat” in the “Mode” dropdown on this page. Maybe have a look in the FAQ of this guide and make sure you done all recommendations?

And why do i get the message “chatgpt4 doesnt exist”?