I've noticed this with Claude Code recently. A few weeks ago, Claude was "amazing" in that I could feed it some context and a specification, and it could generate mostly correct code and refine it in a few prompts.

Now, I can try the same things, and Claude gets it terribly wrong and works itself into problems it can't find its way out of.

The cynical side of me thinks this is being done on purpose, not to save Anthropic money, but to make more money by burning tokens.