计量与计费

This page describes how Document Understanding REST API calls are charged. Charging depends on the project type (modern or classic) and the licensing model (Unified Pricing or Flex Plan).

For pricing through activity packages (DocumentUnderstanding.Activities and IntelligentOCR.Activities), see the user-guide pages instead:

• Metering and charging logic (Unified Pricing) — modern projects under Unified Pricing.
• Metering and charging logic (Flex Plan) — modern projects under Flex Plan.
• Metering and charging logic (Classic) — classic projects (activity-based rates).

Modern projects via API

For Document Understanding modern projects, a single per-page charge covers all REST API operations against that page:

许可模型	Charge per page
统一定价	0.2 个 Platform Units
弹性计划	1 AI unit

The per-page charge applies regardless of which API operations you call. The same charge covers any one of — or any combination of — the following:

• Digitization only
• Classification only
• Extraction only
• A full digitize → classify → extract pipeline (with optional validation)

Calling multiple operations on the same page does not multiply the charge.

Classic projects via API

For Document Understanding classic projects, REST API calls are charged per capability:

功能	统一定价	弹性计划
数字化	0.04 Platform Units/page	0.2 AI units/page
提取	0.2 Platform Units/page	1 AI unit/page
分类	Applicable per page range — see the table below	Applicable per page range — see the table below

The consumption for Classification is applicable per page range:

Document pages	统一定价	弹性计划
1-25	0 PU	0 AIU
26-50	0.2 个 PU	1 AIU
51-75	0.4 PU	2 AIU
76-100	0.6 PU	3 AIU
101-125	0.8 PU	4 AIU
125+	1 PU	5 AIU

备注：

Classification charges are capped at a maximum of 1 Platform Unit (or 5 AI units) per document.

For more information on licensing, see the About licensing page in the Automation Cloud guide.