> ## 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. | |