---
term: "Model drift"
category: "AI risks and safety"
url: https://agenticopenfinance.com/glossary/model-drift
source: AgenticOpenFinance glossary
---

# Model drift

> A decline in a model's or agent's performance over time as data, users or conditions change.

Model drift is an industry term for a decline in a model's performance over time because the data, users or conditions it operates in have changed from those it was built and tested for. For agents, drift also comes from outside changes, such as a provider updating the underlying model, a tool changing its behaviour or merchants changing their pages. Supervisory guidance treats detecting such change as a purpose of ongoing monitoring.

Related terms: [Ongoing monitoring](https://agenticopenfinance.com/glossary/ongoing-monitoring.md), [Change management](https://agenticopenfinance.com/glossary/change-management.md), [Post-market monitoring](https://agenticopenfinance.com/glossary/post-market-monitoring.md), [Data poisoning](https://agenticopenfinance.com/glossary/data-poisoning.md)