Amazon S3 Vectors introduces metadata pre-filtering for up to 5x higher recall on filtered search

UpdateSep 30, 20263d3 days ago·Unverified·Added Oct 2, 2026

Amazon S3 Vectors now supports pre-filtering, which evaluates metadata filters before running similarity search, returning up to 5x more of the matching vectors when your filter is selective. S3 Vectors also adds a prefix match operator ($startsWith) for filtering on values like paths and URLs.

Topics: AI agents, Vector search, SQL, Pricing, Developer tools