[BUG] Weekly Limit Jumped From ~50% to 100% in less than an hour of usage on Max20x Plan

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Within 30 minutes usage exploded to kill my entire weekly usage from ~50% - 100%. I am on Max 20x plan and this is abnormal, considering I daily open up a session using opus 4.8 max effort to audit my codebase and it barely ticks my weekly usage. However, today it completely killed my weekly usage by ~50%.

What Should Happen?

Maximum weekly usage consumption for this situation would probably be by a few percentage points. Even Fable 5 usage would move it by 20%, which is nothing compared to 50%.

Error Messages/Logs

Steps to Reproduce

1. Open up claude code in a terminal and type /model set to opus 4.8 and /effort max for max effort.
2. Give a generic prompt to audit the entire codebase - may also add /superpowers to claude plugin to use it in prompt to trigger subagent-driven audit.
3. Watch weekly usage climb immediately to 100%.

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.181

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_