> ## 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.

# UnifiedBenchmarksMeta

## Fields

| Field         | Type                                                                                                | Required             | Description                                                                                                                                                    | Example                                                                                      |
| ------------- | --------------------------------------------------------------------------------------------------- | -------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------- |
| `as_of`       | *str*                                                                                               | :heavy\_check\_mark: | ISO-8601 timestamp of when this data was last updated.                                                                                                         | 2026-06-03T12:00:00Z                                                                         |
| `citation`    | *Nullable\[str]*                                                                                    | :heavy\_check\_mark: | Required attribution when republishing this data, or null when results span multiple sources (attribute each item individually by its `source` discriminator). | Source: Artificial Analysis (artificialanalysis.ai) via OpenRouter (openrouter.ai/rankings). |
| `model_count` | *int*                                                                                               | :heavy\_check\_mark: | Number of unique models in the response.                                                                                                                       |                                                                                              |
| `source`      | [Nullable\[components.UnifiedBenchmarksMetaSource\]](../components/unifiedbenchmarksmetasource.mdx) | :heavy\_check\_mark: | The source filter applied, or null when all sources are returned.                                                                                              | artificial-analysis                                                                          |
| `source_url`  | *Nullable\[str]*                                                                                    | :heavy\_check\_mark: | URL of the upstream data source, or null when results span multiple sources.                                                                                   | [https://artificialanalysis.ai](https://artificialanalysis.ai)                               |
| `task_type`   | *Nullable\[str]*                                                                                    | :heavy\_check\_mark: | The task\_type filter applied, or null if showing all.                                                                                                         |                                                                                              |
| `version`     | [components.UnifiedBenchmarksMetaVersion](../components/unifiedbenchmarksmetaversion.mdx)           | :heavy\_check\_mark: | Dataset version.                                                                                                                                               |                                                                                              |