Cognitive Services pricing – Language Understanding (LUIS)

Use intelligence APIs to enable vision, language and search capabilities

Language Understanding (LUIS) offers a fast and effective way to add language understanding to applications. With LUIS, you can use pre-existing, world-class, pre-built models whenever they suit your purposes. When you need specialised models, LUIS guides you through the process of quickly building them.

Pricing details

Instance Transactions per second (TPS)1 Features Price
Text requests
Standard -
50 TPS Text requests $- per 1,000 transactions*
Speech requests $- per 1,000 transactions*
1 TPS only applies to web endpoint
2 Free Tier only includes text as an input.
* Dispatch will do two text transactions per request.

Support and SLA

  • Free billing and subscription management support are included.
  • We guarantee that Cognitive Services running in the standard tier will be available at least 99.9 per cent of the time. No SLA is provided for the free trial. Read the SLA


  • For text requests, a transaction is an API call with query length up to 500 characters.

    For speech requests, a transaction is an utterance with query length up to 15 seconds long.

  • No, the free tier only includes text requests with max. length of 500 characters.

  • Dispatch is a feature that enables processing two models/applications with one API call.


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