I'm on $20 Pro plan, I only use Claude through the web chat interface at claude.ai. I do not use Claude Code, the API, or any third-party integrations.
so far for this month "$81.07 spent (Resets May 1)" just 8 days. For basic web-based conversations, accumulating $81 in overage charges within three days(April 5, April 6, April 7) is unreasonable.
Do you have extra usage enabled? Where are you finding this info?