You can get a pretty decent free version of ChatGPT's newest model by using the Microsoft Edge browser and going to Bing chat. You're limited to how long you can have a single discussion, but it's better than going to the limited version on ChatGPT's official website.
I've never found Bing chat to match up with the free ChatGPT. It often just refuses to answer my question while ChatGPT will at least take a guess and give me something to work with.