Who Drifted: the System or the Judge? Anytime-Valid Attribution in LLM Evaluation Pipelines

In three linesMethod to distinguish whether LLM score drift stems from the product or the judge model itself. Uses human-labeled anchor set and betting e-process to detect silent judge model changes. Detects 100% of judge drift with zero false positives on product, outperforms industry-standard rolling z-test.

Summary generated by Claude — human-verified