> For the complete documentation index, see [llms.txt](https://docs.ownlayer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ownlayer.com/monitor/evaluators.md).

# Evaluators

Ownlayer offers 17 different kinds of evaluators covering basic search, JSON validation, and custom evaluators that leverage LLM as the judge. If you're not sure about what is the best, we recommend you start from **Playground** where you can test for the most suitable ones based on your data format.

### Variables

<table><thead><tr><th>Attribute</th><th>Description</th><th data-hidden></th></tr></thead><tbody><tr><td>Input</td><td>Model input</td><td></td></tr><tr><td>Prediction</td><td>Model output</td><td></td></tr><tr><td>Prediction_b</td><td>A different model output from the same input</td><td></td></tr><tr><td>Reference</td><td>Ground truth</td><td></td></tr></tbody></table>


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# Agent Instructions
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## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.ownlayer.com/monitor/evaluators.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.