ChatGPT Plus only GPT-4 model is available!

All models are using GPT-4 to reply. Unable to read files and search the web!!!

I asked the same question to all models and got the same answer: the current model is GPT-4, and it is the latest model. The worst thing is when you ask a slightly more complicated question, and its response is a mess, or you could say completely wrong.

The funniest thing is that when I open ChatGPT in an incognito window, the page automatically redirects to the login page. Is the free version no longer available?