> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ClassifierDimensions

Group results by custom classifier tags, breaking down metrics by the specified dimension values. Requires an active classifier on the workspace.

## Fields

| Field             | Type              | Required             | Description                                                                                                                              | Example                              |
| ----------------- | ----------------- | -------------------- | ---------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------ |
| `classifier_id`   | *str*             | :heavy\_check\_mark: | UUID of the classifier whose tags to group by.                                                                                           | 550e8400-e29b-41d4-a716-446655440000 |
| `dimension_names` | List\[*str*]      | :heavy\_minus\_sign: | N/A                                                                                                                                      |                                      |
| `include_nulls`   | *Optional\[bool]* | :heavy\_minus\_sign: | When true, also include generations that have no tag from this classifier. Defaults to false, which returns only classified generations. |                                      |