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Language Understanding pricing

Teach your apps to understand commands from your users

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

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Prices are estimates only and are not intended as actual price quotes. Actual pricing may vary depending on the type of agreement entered with Microsoft and the currency exchange rate. Prices are calculated based on US dollars and converted using Thomson Reuters benchmark rates refreshed on the first day of each calendar month. Sign in to the Azure pricing calculator to see pricing based on your current program/offer with Microsoft. Contact an Azure sales specialist for more information on pricing or to request a price quote. See frequently asked questions about Azure pricing.

Instance Transactions Per Second (TPS)1 Features Price
Free2 Authoring -
5 TPS Text Requests
Free2 Prediction -
5 TPS Text Requests
Standard -
50 TPS Text Requests $- per 1,000 prediction transactions*
Speech Requests $- per 1,000 prediction transactions*

1 TPS only applies to web endpoint

2 Free Tier includes only text as an input.

* Dispatch will do two text transactions per request. Each text phrase sent in an evaluation request will be charged as a transaction.

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Additional resources

Language Understanding details

Learn more about Language Understanding features and capabilities.

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  • 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 500 characters.

  • Dispatch is a feature that enables processing two models/applications with one API call.
  • Build, manage and publish your app using an authoring key while query endpoints with the prediction key. Learn more
  • Learn more about authoring and publishing regions
  • It is a batch prediction request that provides evaluation results on the published model. Learn more

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