> ## 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.

# DecisionsUsageInputTokensDetails

Of `input_tokens`, those the provider served from its prompt cache.

## Fields

| Field | Type | Required | Description |
| - | - | - | - |
| `CachedTokens` | `int64` | ✔️ | N/A |