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MRKL Systems: A modular, neuro-symbolic architecture that combines large language models, external knowledge sources and discrete reasoning

Canonical reference. 89% of citing Pith papers cite this work as background.

35 Pith papers citing it
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abstract

Huge language models (LMs) have ushered in a new era for AI, serving as a gateway to natural-language-based knowledge tasks. Although an essential element of modern AI, LMs are also inherently limited in a number of ways. We discuss these limitations and how they can be avoided by adopting a systems approach. Conceptualizing the challenge as one that involves knowledge and reasoning in addition to linguistic processing, we define a flexible architecture with multiple neural models, complemented by discrete knowledge and reasoning modules. We describe this neuro-symbolic architecture, dubbed the Modular Reasoning, Knowledge and Language (MRKL, pronounced "miracle") system, some of the technical challenges in implementing it, and Jurassic-X, AI21 Labs' MRKL system implementation.

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representative citing papers

Can Current Agents Close the Discovery-to-Application Gap? A Case Study in Minecraft

cs.AI · 2026-04-27 · unverdicted · novelty 6.0 · 2 refs

SciCrafter benchmark shows frontier AI agents plateau at 26% success on parameterized Minecraft redstone tasks requiring discovery and application of causal regularities, with knowledge application as the largest gap but gap identification emerging as a new hurdle for top models.

Skill Retrieval Augmentation for Agentic AI

cs.CL · 2026-04-27 · unverdicted · novelty 6.0 · 3 refs

Introduces SRA paradigm and SRA-Bench benchmark (5,400 tasks, 26,262 skills) showing retrieval improves performance but LLMs fail to selectively incorporate retrieved skills.

A Survey on Large Language Model based Autonomous Agents

cs.AI · 2023-08-22 · accept · novelty 6.0

A survey of LLM-based autonomous agents that proposes a unified framework for their construction and reviews applications in social science, natural science, and engineering along with evaluation methods and future directions.

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  • ChemCrow: Augmenting large-language models with chemistry tools physics.chem-ph · 2023-04-11 · conditional · none · ref 53 · internal anchor

    ChemCrow augments LLMs with 18 expert chemistry tools to autonomously plan and execute syntheses and guide molecular discoveries in organic synthesis, drug discovery, and materials design.