> ## 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.

# Source

Benchmark source to query. Determines the shape of the returned items. When omitted, returns results from all sources.

## Example Usage

```go theme={null}
import (
	"github.com/OpenRouterTeam/go-sdk/models/operations"
)

value := operations.SourceArtificialAnalysis

// Open enum: custom values can be created with a direct type cast
custom := operations.Source("custom_value")
```

## Values

| Name                       | Value               |
| -------------------------- | ------------------- |
| `SourceArtificialAnalysis` | artificial-analysis |
| `SourceDesignArena`        | design-arena        |
| `SourceOpenrouter`         | openrouter          |