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Larimar: Large Language Models with Episodic Memory Control

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arxiv 2403.11901 v4 pith:CD5C5NNF submitted 2024-03-18 cs.LG cs.AI

classification cs.LGcs.AI
keywords larimarmemoryarchitectureeditingepisodicfactknowledgelanguage
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Efficient and accurate updating of knowledge stored in Large Language Models (LLMs) is one of the most pressing research challenges today. This paper presents Larimar - a novel, brain-inspired architecture for enhancing LLMs with a distributed episodic memory. Larimar's memory allows for dynamic, one-shot updates of knowledge without the need for computationally expensive re-training or fine-tuning. Experimental results on multiple fact editing benchmarks demonstrate that Larimar attains accuracy comparable to most competitive baselines, even in the challenging sequential editing setup, but also excels in speed - yielding speed-ups of 8-10x depending on the base LLM - as well as flexibility due to the proposed architecture being simple, LLM-agnostic, and hence general. We further provide mechanisms for selective fact forgetting, information leakage prevention, and input context length generalization with Larimar and show their effectiveness. Our code is available at https://github.com/IBM/larimar

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Forward citations

Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

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  4. GET: Goal-directed Exploration and Targeting for Large-Scale Unknown Environments

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    A framework coupling LLM direction proposals with an external evaluator and a Gaussian-mixture experience memory reduces object-search path length and time versus heuristic baselines in real-world large-scale robot trials.

  5. Memorization and Knowledge Injection in Gated LLMs

    cs.CL 2025-04 conditional novelty 6.0 of 10

    MEGa injects episodic memories into separate gated LoRA adapters selected by embedding similarity, mitigating catastrophic forgetting and enabling recall, QA, and compositional questions on two datasets.

  6. MIITA: Memory-Induced Inference-Time Adaptation for Continual Learning with Small Language Models

    cs.AI 2026-05 conditional novelty 5.0 of 10

    MIITA stores past supervised examples as compact hidden-space correction directions and applies retrieved directions through gated temporary hidden-state updates, improving continual learning in small language models ...

  7. Position: Episodic Memory is the Missing Piece for Long-Term LLM Agents

    cs.AI 2025-02 conditional novelty 5.0 of 10

    The authors propose episodic memory, with five defining properties, as the unifying framework needed for LLM agents to learn and remember over long time horizons.

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