It seems pretty clear there is some sort of bug that only some people are experiencing (or, very cynically, perhaps an A/B test). My usage hasn't seemed to change much in the past few days, but then I see reports where people are hitting limits after one or two prompts. I doubt that could be user error or new limits.

Anthropic has said they are investigating. https://www.reddit.com/r/ClaudeAI/comments/1s7zgj0/investiga...