Claude is demonstrably bad now and is getting worse. Which is either

a) Entropy - too much data being ingested b) It's nerfed to save massive infra bills

But it's getting worse every week

I think most people saying this had the following experience.

"Holy shit, claude just one shotted this <easy task>"

"I should get Claude to try <harder task>"

..repeat until Claude starts failing on hard tasks..

"Claude really sucks now."