# Drift Detection: Output Distribution Shift + Embedding-Cluster Anomaly

> Source: https://sukruyusufkaya.com/learn/fine-tuning-cookbook/ftc-drift-detection-output-shift
> Updated: 2026-08-13T10:56:57.288Z
> Category: Fine-Tuning Cookbook (Model-by-Model)
> Module: Part XVI — Production Operations
**TLDR:** Modeller production'da zamanla 'drift' eder: input distribution kayar, output style değişir. Tespit: response length histogram shift, embedding distance baseline → mean cluster drift, user thumbs-down rate trend. Cookbook'un weekly drift report'u — alarm + auto-retrain trigger.