# Model Drift

> The gradual loss of a model's fidelity to the reality it represents, as data or conditions change over time.

Record: `lexicon:model-drift`
Kind: anti-pattern
Layer: [Structural Core](https://banes-lab.com/records/layer/structural-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lexicon-model-drift

Listed in [Lexicon terms](https://banes-lab.com/api/records/lexicon.md), after [Saga](https://banes-lab.com/records/lexicon/saga.md) and before [Stable Contracts](https://banes-lab.com/records/lexicon/stable-contracts.md).

## Category

- [Core Vocabulary](https://banes-lab.com/records/lexicon-category/core-vocabulary.md)

## Negated by

- [Model Drift Monitoring](https://banes-lab.com/records/architecture/model-drift-monitoring.md)

## Linked from

- [Model Architecture](https://banes-lab.com/ontology/principles/architecture-category-model-architecture.md)
- [Model Architecture](https://banes-lab.com/ontology/lexicon/lexicon-category-model-architecture.md)