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Statler: State-Maintaining Language Models for Embodied Reasoning (2306.17840v4)

Published 30 Jun 2023 in cs.RO and cs.CL

Abstract: There has been a significant research interest in employing LLMs to empower intelligent robots with complex reasoning. Existing work focuses on harnessing their abilities to reason about the histories of their actions and observations. In this paper, we explore a new dimension in which LLMs may benefit robotics planning. In particular, we propose Statler, a framework in which LLMs are prompted to maintain an estimate of the world state, which are often unobservable, and track its transition as new actions are taken. Our framework then conditions each action on the estimate of the current world state. Despite being conceptually simple, our Statler framework significantly outperforms strong competing methods (e.g., Code-as-Policies) on several robot planning tasks. Additionally, it has the potential advantage of scaling up to more challenging long-horizon planning tasks.

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