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AI agent memory vs RAG — what's the difference?

This story is from 2026-09-11. It is preserved in the archive; the latest stories are on the live feed.

Most teams building on LLMs end up with two patterns in the same codebase: RAG for looking things up in a corpus, and some hand-rolled memory for remembering what the agent has done or what the user has said. The two are often confused, and the confusion costs real engineering time when one is used…

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  1. 2026-09-11 15:28 · DEV Community — AI
    AI agent memory vs RAG — what's the difference?

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