I use Claude Code with Opus four days a week for about 5 hours a day. I've only once hit the limit. Yet the tool others mentioned here (ccusage) indicates I used about $120 in API equivalents per day or about $1,800 to date this month on a $200 subscription. That has to be a loss leader for Anthropic that they now want to wind back.

I also wouldn't consider my usage extreme. I never use more than one instance, don't run overnight, etc.