> ## 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.

# InputTokensDetails

## Fields

| Field           | Type  | Required             | Description |
| --------------- | ----- | -------------------- | ----------- |
| `cached_tokens` | *int* | :heavy\_check\_mark: | N/A         |