> ## 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.

# DecisionsResponseUsage

## Fields

| Field | Type | Required | Description |
| - | - | - | - |
| `Cost` | `*float64` | ➖ | N/A |
| `InputTokens` | `int64` | ✔️ | N/A |
| `InputTokensDetails` | [\*components.DecisionsUsageInputTokensDetails](../../models/components/decisionsusageinputtokensdetails.mdx) | ➖ | Of `input_tokens`, those the provider served from its prompt cache. |
| `OutputTokens` | `int64` | ✔️ | N/A |