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On November 10, 2026, Amazon Bedrock Managed Knowledge Base added two new modes, single-pass RAG and retrieval-only, through AgenticRetrieveStream. These modes share the same API as the existing agentic retrieval, and the maxAgentIteration range has been extended to 0–5. With maxAgentIteration=1, that is single-pass RAG: after one retrieval, the foundation model generates an answer with citations, reducing latency and model calls; when set to 0, only matching passages are returned and the foundation model is not called. All three modes support multiple knowledge bases. There are currently no further developments.
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Amazon Bedrock Managed Knowledge Base supports single-shot and agentic retrievalDevelopments
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Amazon Bedrock Managed Knowledge Base supports single-turn RAG and retrieval-only modes
Source:AWS Machine Learning
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Nov 10
AWS Machine LearningFirst-party
Amazon Bedrock Managed Knowledge Base supports single-shot and agentic retrieval
Amazon Bedrock Managed Knowledge Base adds two new modes via AgenticRetrieveStream—single-shot RAG and retrieval-only—sharing the same API as the existing agentic retrieval, with the maxAgentIteration range extended to 0–5. maxAgentIteration=1 is single-shot RAG: after one retrieval, the foundation model generates an answer with citations, reducing latency and model calls; setting it to 0 returns only matching passages without calling the foundation model. All three modes support multiple knowledge bases.