> This page is for version v2025-04-21.
> For other versions, use one of these documentation indexes:
> - v2026-02-09 (default): https://docs.extend.ai/2026-02-09/llms.txt
> - v2025-04-21: https://docs.extend.ai/2025-04-21/llms.txt
> - v2024-12-23: https://docs.extend.ai/2024-12-23/llms.txt

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.extend.ai/llms.txt
> Use this file to discover all available pages before exploring further.
>
> ## API version
> The current API version is `2026-02-09`, served at the site root (no version prefix in URLs).
> If this page URL contains `/2025-04-21/` or `/2024-12-23/`, you are reading an older API version.
> Prefer the current docs at https://docs.extend.ai/llms.txt unless the user explicitly needs that older version.
> Do not treat older-version pages as the source of truth for new integrations.

# Processor cost preview and charge-level usage breakdown

> usage.breakdown entries can include a charges array itemizing cost drivers — billing product, unit, quantity, credits, and page-level detail.

Run responses now include a finer-grained credit breakdown. Each entry in `usage.breakdown` can now include a `charges` array that itemizes the cost drivers behind that run's credits — for example base processor, review agent, or page-specific add-ons like agentic text correction. Each charge lists the billing product, unit (`page` or `cell`), quantity, credits consumed, and applicable page numbers when billing is page-scoped.

For background on billing units, see [How credits work](/general/how-credits-work). For the run usage shape, see [`usage` on the extract run response](/api-reference/endpoints/extract/get-extract-run#response.body.usage).

* **API** — optional `charges` on each `usage.breakdown` entry with product, unit, quantity, credits, and page-level detail where applicable