> ## 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. # ImagePricingEntry One billable pricing line for an image provider. ## Fields | Field | Type | Required | Description | | ---------- | ------------------------------------------------- | -------------------- | ----------- | | `billable` | [components.Billable](../components/billable.mdx) | :heavy\_check\_mark: | N/A | | `cost_usd` | *float* | :heavy\_check\_mark: | N/A | | `unit` | [components.Unit](../components/unit.mdx) | :heavy\_check\_mark: | N/A | | `variant` | *Optional\[str]* | :heavy\_minus\_sign: | N/A |