Is Claude 20x actually 20x?

Im seeing more and more about how Claude 20x is actually not 20x and its getting "dumber". I thought I was going crazy because I legitimately thought maybe I was doing something wrong but I haven’t changed any of my practises and approaches for at least a month or two and it’s definitely gotten way dumber and making way more errors and I’m having to redo a lot of work and while at the same time it’s just burning through tokens

https://www.reddit.com/r/ClaudeCode/comments/1wn0xn9/max20x_is_now_just_15_times_better_than_max5x/

https://www.reddit.com/r/ClaudeAI/comments/1wl6wyn/its_time_to_cancel_your_subscriptions_anthropic/