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model drift

/ˈmɒdəl drɪft/ - n.

1 [colloq.] The model did not change. The world did, and no one was watching the gap.Keep. Punchy.This is the problem.

Working definition

2. Degradation of a deployed model's accuracy as live data diverges from the data it was trained on.

Promoted

See also

concept driftThe thing being measured moved; the dashboard, helpfully, stayed green.
inferenceThe part priced per call, unlike the definitions it relies on, which are free and missing.
label driftDefinition drift, now with a confidence interval.
model monitoringA panel that shows the model is healthy by reporting every signal except whether it is still right.