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Amazon OpenSearch Service now supports OpenSearch version 3.1

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Amazon OpenSearch Service has announced support for OpenSearch version 3.1, which introduces significant improvements for search and generative AI workloads:

  • Incorporates Lucene 10 with optimized vector field indexing
  • Provides faster indexing times and reduced index sizes
  • Introduces Search Relevance Workbench for search quality optimization
  • Enhances vector search capabilities with Z-score normalization
  • Implements memory-optimized search using Faiss engine
  • Improves range query performance for log analytics
  • Reduces latency for high-cardinality aggregations

The new version is now available in all AWS Regions where Amazon OpenSearch Service is supported, offering enhanced performance and tools for vector-driven applications.



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