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Conversational language understanding limits

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  • 2 minutes to read

Use this article to learn about the data and service limits when using conversational language understanding.

Language resource limits

  • Your Language resource must be one of the following pricing tiers:

    Tier Description Limit
    F0 Free tier You are only allowed one F0 Language resource per subscription.
    S Paid tier You can have up to 100 Language resources in the S tier per region.

See pricing for more information.

  • You can have up to 500 projects per resource.

  • Project names have to be unique within the same resource across all custom features.

Regional availability

Conversational language understanding is only available in some Azure regions. Some regions are available for both authoring and prediction, while other regions are prediction only. Language resources in authoring regions allow you to create, edit, train, and deploy your projects. Language resources in prediction regions allow you to get predictions from a deployment.

Region Authoring Prediction
Australia East ✓ ✓
Brazil South ✓
Canada Central ✓
Central India ✓ ✓
Central US ✓
China East 2 ✓ ✓
China North 2 ✓
East Asia ✓
East US ✓ ✓
East US 2 ✓ ✓
France Central ✓
Japan East ✓
Japan West ✓
Jio India West ✓
Korea Central ✓
North Central US ✓
North Europe ✓ ✓
Norway East ✓
Qatar Central ✓
South Africa North ✓
South Central US ✓ ✓
Southeast Asia ✓
Sweden Central ✓
Switzerland North ✓ ✓
UAE North ✓
UK South ✓ ✓
West Central US ✓
West Europe ✓ ✓
West US ✓
West US 2 ✓ ✓
West US 3 ✓ ✓

API limits

Item Request type Maximum limit
Authoring API POST 10 per minute
Authoring API GET 100 per minute
Predection API GET/POST 1,000 per minute

Quota limits

Pricing tier Item Limit
F Training time 1 hour per month
S Training time Unlimited, Pay as you go
F Prediction Calls 5,000 request per month
S Prediction Calls Unlimited, Pay as you go

Data limits

The following limits are observed for the conversational language understanding.

Item Lower Limit Upper Limit
Number of utterances per project 1 25,000
Utterance length in characters (authoring) 1 500
Utterance length in characters (prediction) 1 1000
Number of intents per project 1 500
Number of entities per project 0 350
Number of list synonyms per entity 0 20,000
Number of list synonyms per project 0 2,000,000
Number of prebuilt components per entity 0 7
Number of regular expressions per project 0 20
Number of trained models per project 0 10
Number of deployments per project 0 10

Naming limits

Item Limits
Project name You can only use letters (a-z, A-Z), and numbers (0-9) , symbols _ . -, with no spaces. Maximum allowed length is 50 characters.
Model name You can only use letters (a-z, A-Z), numbers (0-9) and symbols _ . -. Maximum allowed length is 50 characters.
Deployment name You can only use letters (a-z, A-Z), numbers (0-9) and symbols _ . -. Maximum allowed length is 50 characters.
Intent name You can only use letters (a-z, A-Z), numbers (0-9) and all symbols except ":", $ & % * ( ) + ~ # / ?. Maximum allowed length is 50 characters.
Entity name You can only use letters (a-z, A-Z), numbers (0-9) and all symbols except ":", $ & % * ( ) + ~ # / ?. Maximum allowed length is 50 characters.

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