# Amazon — Agentic retrieval with LangChain and Amazon Bedrock Knowledge Bases

- Company: Amazon (amazon.com)
- Announced: 2026-10-05T15:53:56+00:00
- Category: capability-change
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://aws.amazon.com/blogs/machine-learning/agentic-retrieval-with-langchain-and-amazon-bedrock-knowledge-bases/
- Record: https://forck.live/items/16054-agentic-retrieval-with-langchain-and-amazon-bedrock-knowledge-bases
- Subject: Bedrock / Nova

Amazon Bedrock Managed Knowledge Base now supports agentic retrieval, which breaks a multi-part question into sub-queries, runs them, judges whether it has enough evidence, and searches again if it doesn't. The langchain-aws package exposes both agentic and standard retrieval, allowing LangChain applications to use either method. The AgenticRetrieveStream API runs a planning loop and streams trace events back to the user.

## Evidence

Verbatim from https://aws.amazon.com/blogs/machine-learning/agentic-retrieval-with-langchain-and-amazon-bedrock-knowledge-bases/:

> Agentic retrieval is available on Amazon Bedrock Managed Knowledge Base. Instead of one search, Amazon Bedrock Managed Knowledge Base plans the retrieval. It breaks the question into sub-queries, runs them, judges whether it has enough evidence, and searches again if it doesn't.

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