S3 vectors

S3 Vectors vs OpenSearch Serverless for RAG on AWS

• Pratik Kulkarni
• AWS , Cloud Architecture
• 02 Sep, 2026

This is a choice you only face on the customer-managed path — if you have not ruled out the fully managed option yet, [building RAG on your S3 documents with Bedrock](/blog/rag-on-s3-documents-with-be