# Can I choose which models to track?

**Short answer:** Yes, under Settings, Engines. Turning an engine off stops new runs against it; the history already collected stays and remains visible in past periods.

- Last reviewed against the product: 2026-10-21
- Original page: https://nomahq.app/help/article/can-i-choose-which-models-to-track

## How to change engines

1. Open Settings, then Engines.
2. Switch engines on or off.
3. New runs follow the new selection from the next run onward.

## What happens to past data

Nothing is deleted. Answers already collected from an engine you switch off stay in the periods they were collected in. When comparing periods, remember which engines were active in each.