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Document Understanding classic user guide

Last updated Apr 23, 2026

Metering and charging logic (Flex Plan)

This section includes specific information about the metering & charging logic for AI units, depending on the used activity, and explains the AI unit cost per page for extractors, OCR engines, classifiers, and other components. More details about AI Units can be found here and details about licensing can be found here.

Tip:
Note:

The charges apply per extracted page and per extraction method, meaning that, for example, both Form Extractor and Machine Learning Extractor are run, then the charges would be 1.2 AI units.

Note:

For training costs, check the AI units page from the AI Center guide.

DigitizationAI unit cost per processed page

UiPath Document OCR *

* Requires a valid DU license
0

Extended Languages OCR *

* Requires a valid DU license
0

OCR for Chinese Japanese Korean *

* Requires a valid DU license

* Runs only on a CPU VM

0
Omnipage OCR0
Tesseract OCR0
Microsoft OCR0
Microsoft Azure Computer Vision OCR * * Requires external license, consumption varies by provider0
Google Cloud Vision OCR * * Requires external license, consumption varies by provider0
ClassificationAI unit cost per classified page
Keyword Classifier0
Intelligent Keyword ClassifierApplicable per page range*
Machine Learning ClassifierApplicable per page range*
Customer-Managed third party Classifier0.1

The extraction for Keyword Classifier is free, while for Intelligent Keyword Classifier and ML Classifier the following costs are applied:

Document PagesAI Units Needed
1-250
26-501
51-752
76-1003
101-1254
125+5
Note:

Classification charges are capped at maximum 5 units per document.

ExtractionAI unit cost per processed page
RegEx Extractor0
Form Extractor0.2
Machine Learning Extractor1*
Forms AI1
Customer-Managed third party Extractor0.1
Note:

The Machine Learning Extractor consumes one AI unit/processed page, even if the extracted information is not to be found on that page.

Other ComponentsAI unit cost per processed page
Validation Station0
Classification Station0
Taxonomy Manager0
Note:

For further pricing-related questions, please contact our sales team.

Generative features

Depending on the version of the activity package you are using, there are slight differences related to AI units consumption. The consumption models are detailed in the sections that follow.

Note:

Generative prelabeling does not consume AI Units when:

  • calling a public endpoint from a session hosted on Automation Cloud
  • calling a skill deployed in Automation Cloud™ from a Document Manager session hosted on Automation Cloud Generative prelabeling consumes AI Units when:
  • calling a public endpoint from a session hosted on Automation Suite
  • calling a skill deployed in Automation Suite from a Document Manager session hosted on Automation Cloud

Activities version 24.12-preview and newer

This consumption is applied when using PredefinedGenerative projects with the following::

  • IntelligentOCR newer than 6.23.2-preview.
  • DocumentUnderstanding.Activities newer than 2.13.2-preview.
  • Document Understanding API v1.1.

Consumption:

  • 1 AI Unit per processed page (includes Generative Classification and Generative Extraction)
    Note:

    When enabled, Generative Validation adds 1 AI Unit, bringing the total consumption to 2 AI Units per processed page.

Activities version older than 24.12-preview

This consumption model is applied when using:

  • IntelligentOCR up to 6.23.2-preview with PredefinedGenerative projects;
  • DocumentUnderstanding.Activities up to 2.13.2-preview with PredefinedGenerative projects;
  • Document Understanding API v1.0 with Predefined projects.

AI Units consumption for generative features in activity versions older than 24.12-preview is detailed in the following table.

Generative featureConsumed AI units
Generative Classifier0.2 per operation
Generative Extraction1.2 per operation
Generative Validation1 per operation

Rest API metering and charging logic

This section includes specific information about the metering & charging logic for Platform Units, depending on the used capability, and explains the Platform Unit cost per page for APIs. Find more details about Platform Units here, and details about licensing, here.

  • Digitization — 0.2 Platform Units/page
  • Extraction — 1 Platform Unit/page
  • Classification — Applicable per page range*

*The consumption for Classification is applicable per page range as follows:

Document PagesPlatform Units Needed
1-250
26-501
51-752
76-1003
101-1254
125+5
Note:

Classification charges are capped at maximum five units per documents.

  • Generative features
  • Activities version 24.12-preview and newer
  • Activities version older than 24.12-preview
  • Rest API metering and charging logic

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