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AWS CDK enables agentic retrieval on Amazon Bedrock Managed Knowledge Base

1 reports1 sources10/26/2026 updated

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AI overview

AWS introduces a solution using AWS CDK to build agentic retrieval on Amazon Bedrock Managed Knowledge Base. The system allows agents to decompose user queries into sub-queries and iteratively retrieve context from knowledge bases, looping until sufficient information is synthesized into an answer. A key routing feature directs queries to specialized knowledge bases based on topic, such as finance or weather. The solution eliminates the need for traditional infrastructure management, removing the requirement to provision vector stores, create and wait for indexes, or pay for idle OCUs.

Written with AI from the reporting · updated 10/26/2026

Latest developmentOct 27, 01:15
AWS launches Managed Amazon Bedrock Knowledge Base with AgenticRetrieveStream API for multi-turn retrieval
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  1. 1Unclassified fact stationOct 27, 00:00recorded Oct 27, 01:22single source

    Build agentic retrieval on a Managed Amazon Bedrock Knowledg

    Read original source ↗ AWS Machine Learning BlogReplay this moment in the explorer
    Evidence & revisions · 1 source records
    Subject：
    Amazon Bedrock
    Action：
    Build agentic retrieval
    Object：
    Managed Amazon Bedrock Knowledge Base
    Occurred (fact side)：
    Oct 27, 00:00
    AWS Machine Learning Blog ↗Report pageOriginal / first version
    Published (valid side)：
    Oct 27, 01:15
    First seen (known side)：
    Oct 27, 01:22
    Fact stationSingle source · one-sided claim

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Oct 27
  1. AWS Machine Learning BlogSelectedFirst-party sourceRelated fact: single source
    AWS launches Managed Amazon Bedrock Knowledge Base with AgenticRetrieveStream API for multi-turn retrieval

    Report first recorded Oct 27, 01:22

    AWS introduces a Managed Amazon Bedrock Knowledge Base that transforms retrieval into an agentic capability, replacing single embed-and-fetch calls with multi-turn planning and tool-driven retrieval. The AgenticRetrieveStream API enables a reasoning agent to decide whether to retrieve, which knowledge base to consult, and whether to iterate before composing a grounded, cited answer. This addresses limitations of ordinary RAG, such as answers spanning multiple corpora or requiring follow-up lookups after initial results. The service is now available as a first-class feature, eliminating the need to manually manage OpenSearch Serverless collections. AWS CDK users can now provision the knowledge base and AgenticRetrieveStream as stacks, though observability remains critical due to the non-deterministic paths agents take during retrieval.

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