Amazon Bedrock adds single-shot RAG and retrieval-only modes
Amazon Bedrock Managed Knowledge Base now offers one-search answer generation and passage-only retrieval without a model call through the same AgenticRetrieveStream API.
AT A GLANCE
Key points
- Iteration 0 returns passages with no foundation-model call
- Iteration 1 performs one retrieval and generates an answer
- Iterations 2–5 retain multi-step agentic retrieval
What is changing?
AWS has expanded the AgenticRetrieveStream API in Amazon Bedrock Managed Knowledge Base to support three retrieval patterns. With maxAgentIteration set to 0, the service returns relevant passages and makes no foundation-model call. A value of 1 performs one search and generates a grounded answer, while values from 2 to 5 preserve the existing agentic behavior with multi-step planning and multiple searches.
The change lets developers reduce latency and model usage for straightforward document questions while retaining agentic retrieval for complex comparisons. AWS’s banking-assistant example is an illustrative scenario, not a customer deployment or measured performance result. Teams should test the lowest sufficient iteration limit for each workflow using representative questions, cost, latency, and evidence support.
Explore the original sources
Source date: 9 November 2026.
Published by AI Radar: 10 Nov 2026, 01:11 (Istanbul, UTC+3).
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