What do you use for AI observability when models silently drift?
Fine-tuned classification model, self-hosted, feeding a customer-facing flow. Every infra metric we track stayed healthy for three straight weeks. A support ticket is what actually told us something was wrong, a customer said the categorization felt off. Precision had drifted noticeably and nothing on any dashboard showed it.
The gap is specific. We observe the service, is it up, is it fast, but not the model, are its outputs still correct. Those are different signals and we'd conflated them. For teams who've built this out, what's the actual signal you alert on versus just review weekly?