Amazon S3 Vectors adds metadata pre-filtering option
🔎 Amazon S3 Vectors now supports metadata pre-filtering to evaluate filters before similarity search, returning up to 5x more matching vectors when filters are selective. It also introduces a $startsWith prefix-match operator for filtering on paths and URLs. New indexes in vector buckets enable pre-filtering by default; existing indexes can be updated with the UpdateIndexMode API. The feature is available at no extra cost across commercial and China AWS Regions and will be deployed in the coming days.