> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://openrouter.ai/docs/llms.txt.
> For full documentation content, see https://openrouter.ai/docs/llms-full.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://openrouter.ai/docs/_mcp/server.

# CostDetails - Python SDK

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

Breakdown of upstream inference costs

## Fields

| Field                                 | Type                       | Required             | Description |
| ------------------------------------- | -------------------------- | -------------------- | ----------- |
| `upstream_inference_completions_cost` | *float*                    | :heavy\_check\_mark: | N/A         |
| `upstream_inference_cost`             | *OptionalNullable\[float]* | :heavy\_minus\_sign: | N/A         |
| `upstream_inference_prompt_cost`      | *float*                    | :heavy\_check\_mark: | N/A         |