Grok usage meter bug hides sub-agent costs, underbilling by 4x
Daniel_Farinax · x · 2026-09-02
A user discovered a critical bug in Grok's usage meter. During a 5-hour session, the dashboard showed a consumption of 17% quota ($32). However, the loop spawned 45 sub-agent sessions that were not counted by the /usage command, adding another $110 in hidden costs. The real total was $143 (547M tokens), roughly 4.4x the displayed amount. In comparison, Claude's tracking was accurate.
Related event: Grok Heavy billing underreports hidden sub-sessions(2 posts)→
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