> ## 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.

# ResponsesRequestServiceTier

The service tier to use for processing this request. `fast` is accepted as an alias for `priority`.

## Example Usage

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

value := components.ResponsesRequestServiceTierAuto

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

## Values

| Name | Value |
| - | - |
| `ResponsesRequestServiceTierAuto` | auto |
| `ResponsesRequestServiceTierDefault` | default |
| `ResponsesRequestServiceTierFast` | fast |
| `ResponsesRequestServiceTierFlex` | flex |
| `ResponsesRequestServiceTierPriority` | priority |
| `ResponsesRequestServiceTierScale` | scale |