---
title: Model: Override
slug: feature-experimentation/api/model-override
docTags: 
createdAt: 2026-09-16T16:59:34.550Z
---

### Code examples

```json
{
  "userId": "",
  "experimentKey": "",
  "variationKey": "",
  "prevVariationKey": "",
  "messages": [
    ""
  ]
}
```