# Model history

> Model history - On a deployment's Model history tab, you can view a historical log of deployment
> events.

This Markdown file sits beside the HTML page at the same path (with a `.md` suffix). It summarizes the topic and lists links for tools and LLM context.

Companion generated at `2026-05-06T18:17:10.023812+00:00` (UTC).

## Primary page

- [Model history](https://docs.datarobot.com/en/docs/workbench/nxt-console/nxt-activity-log/nxt-model-history.html): Full documentation for this topic (HTML).

## Related documentation

- [NextGen UI documentation](https://docs.datarobot.com/en/docs/workbench/index.html): Linked from this page.
- [Console](https://docs.datarobot.com/en/docs/workbench/nxt-console/index.html): Linked from this page.
- [Activity log](https://docs.datarobot.com/en/docs/workbench/nxt-console/nxt-activity-log/index.html): Linked from this page.
- [replace the deployed model](https://docs.datarobot.com/en/docs/workbench/nxt-console/nxt-overview/nxt-deployment-actions.html#replace-deployed-models): Linked from this page.

## Documentation content

Tracking deployment events on a deployment's Activity log > Model history tab is essential when a deployed model supports a critical use case. You can maintain deployment stability by monitoring a model's history through this event log. These events include when the model was deployed or replaced. The deployment history links these events to the user responsible for the change. Each model replacement event reports the replacement date and justification (if provided). In addition, you can find and copy the model IDs of any previously deployed model, or you can click a registered model ID to open the model in Registry (if you have access).

When a model begins to experience data or accuracy drift, you should collect a new dataset, train a new model, and replace the old model. The details of this deployment lifecycle are recorded, including timestamps for model creation and deployment and a record of the user responsible for the recorded action. Any user with deployment owner permissions can [replace the deployed model](https://docs.datarobot.com/en/docs/workbench/nxt-console/nxt-overview/nxt-deployment-actions.html#replace-deployed-models).