> ## 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.

# ClassifierFiltersFilter

## Fields

| Field | Type | Required | Description | Example |
| - | - | - | - | - |
| `field` | *str* | :heavy\_check\_mark: | Classifier dimension name to filter on (snake\_case identifier, e.g. "department", "work\_type"). | department |
| `operator` | *str* | :heavy\_check\_mark: | Filter operator. Only equality/set operators are supported (eq, neq, in, not\_in) — ordered comparisons are not available because classification values are strings. | eq |
| `value` | [operations.ClassifierFiltersValue](../operations/classifierfiltersvalue.mdx) | :heavy\_check\_mark: | Filter value. Use a scalar (string or number) for eq/neq, or an array for in/not\_in. | Engineering |