> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-7021d5f4.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Usage - Python SDK

> Usage method reference

<Warning>
  The Python SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/python-sdk/issues).
</Warning>

## Fields

| Field           | Type               | Required             | Description |
| --------------- | ------------------ | -------------------- | ----------- |
| `prompt_tokens` | *float*            | :heavy\_check\_mark: | N/A         |
| `total_tokens`  | *float*            | :heavy\_check\_mark: | N/A         |
| `cost`          | *Optional\[float]* | :heavy\_minus\_sign: | N/A         |