> ## 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. # Speed Controls output generation speed. When set to `fast`, uses a higher-speed inference configuration at premium pricing. Defaults to `standard` when omitted. ## Example Usage ```go theme={null} import ( "github.com/OpenRouterTeam/go-sdk/models/components" ) value := components.SpeedFast // Open enum: custom values can be created with a direct type cast custom := components.Speed("custom_value") ``` ## Values | Name | Value | | --------------- | -------- | | `SpeedFast` | fast | | `SpeedStandard` | standard |