> ## 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. | |