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OpenSearch 3.6: LTS Ships With Agentic AI and 32x Vector Compression

OpenSearch 3.6 and version 2.19 have shipped as the first two releases to carry official Long-Term Support status, a designation the project has lacked since the Elasticsearch fork in 2021. OpenSearch 3.6 also introduces 32x vector compression, an experimental Relevance Agent that tunes search relevance via natural language, and a preconfigured observability stack for tracking AI agent token usage.

read1 min views1 publishedSep 18, 2026

OpenSearch 3.6 has shipped, and its most significant label is one the project has never had before: Long-Term Support. Enterprise teams have been waiting for this since the Elasticsearch fork in 2021. But the LTS badge is almost a footnote compared to what’s packed inside — 32x vector compression, an experimental Relevance Agent that tunes search relevance via natural language, and a preconfigured observability stack that knows what your AI agents are doing with every token. The LTS Story, Finally OpenSearch 3.6 and version 2.19 are the first two releases to carry official LTS status, backed by the OpenSearch Software […]

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