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Sentiment analysis

Important

Language Understanding Intelligent Service (LUIS) will be fully retired on March 31, 2026. LUIS resource creation isn't available. Beginning on October 31, 2025, the LUIS portal will no longer be available. We recommend migrating your LUIS applications to conversational language understanding to benefit from continued product support and multilingual capabilities.

If Sentiment analysis is configured, the LUIS json response includes sentiment analysis. Learn more about sentiment analysis in the Language service documentation.

LUIS uses V2 of the API.

Sentiment Analysis is configured when publishing your application. See how to publish an app for more information.

Resolution for sentiment

Sentiment data is a score between 1 and 0 indicating the positive (closer to 1) or negative (closer to 0) sentiment of the data.

When culture is en-us, the response is:

"sentimentAnalysis": {
  "label": "positive",
  "score": 0.9163064
}

Next steps