Abnormal token consumption rate on Opus 4.5 — 100% usage in ~1 hour

Bug Report

Description

Token consumption has become drastically higher than normal, inconsistent with months of prior Claude Code usage on the same plan.

Observed Behavior

• This morning: Burned through 100% of usage allocation in approximately 1 hour
• Current session: Two light/low-activity sessions running simultaneously on Opus 4.5, already at 20% usage after only ~30 minutes
• Each session individually shows 10-15% usage despite minimal activity

Expected Behavior

Based on months of consistent Claude Code usage, this level of consumption is completely abnormal. Light sessions like these would historically use a small fraction of the daily allocation over the same time period.

Environment

• Model: Claude Opus 4.5 (claude-opus-4-5-20250514)
• Platform: macOS (Darwin 25.3.0)
• Claude Code: CLI

Evidence

I have timestamped screenshots confirming the usage spike and can provide them if needed.

Additional Context

• This is not a change in my usage patterns — same types of sessions, same workflows
• The spike appears to have started recently (noticed today, 2026-03-27)
• No unusually large file reads, no runaway agent loops — just normal interactive usage

<img width="1388" height="774" alt="Image" src="https://github.com/user-attachments/assets/296f862b-bc97-4655-a861-199afbf99571" />
<img width="2410" height="706" alt="Image" src="https://github.com/user-attachments/assets/c86864ec-8c19-488c-9785-e32b32e8e2ef" />