Debate Only When Necessary: Adaptive Multiagent Collaboration for Efficient LLM Reasoning

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Main Authors: Eo, Sugyeong, Moon, Hyeonseok, Zi, Evelyn Hayoon, Park, Chanjun, Lim, Heuiseok
Format: Preprint
Published: 2025
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author Eo, Sugyeong
Moon, Hyeonseok
Zi, Evelyn Hayoon
Park, Chanjun
Lim, Heuiseok
author_facet Eo, Sugyeong
Moon, Hyeonseok
Zi, Evelyn Hayoon
Park, Chanjun
Lim, Heuiseok
contents Multiagent collaboration has emerged as a promising framework for enhancing the reasoning capabilities of large language models (LLMs). Despite improvements in reasoning, the approach introduces substantial computational overhead resulting from iterative agent interactions. Furthermore, engaging in unnecessary debates increases the risk of generating erroneous responses. To address these challenges, we propose Debate Only When Necessary (DOWN), an adaptive multiagent debate framework that selectively activates debate based on the confidence score of the agent's initial response. Debate is activated only for queries requiring further deliberation, during which agents refine their outputs by referencing peer responses and associated confidence scores. Evaluations on benchmarks show that DOWN improves efficiency by up to six times while preserving or even outperforming the performance of existing methods. Further analysis indicates that DOWN effectively mitigates the risk of error propagation stemming from the unnecessary debate process. These findings demonstrate the effectiveness of our approach in delivering high-performance LLM solutions at a lower computational cost.
format Preprint
id arxiv_https___arxiv_org_abs_2504_05047
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Debate Only When Necessary: Adaptive Multiagent Collaboration for Efficient LLM Reasoning
Eo, Sugyeong
Moon, Hyeonseok
Zi, Evelyn Hayoon
Park, Chanjun
Lim, Heuiseok
Artificial Intelligence
Multiagent collaboration has emerged as a promising framework for enhancing the reasoning capabilities of large language models (LLMs). Despite improvements in reasoning, the approach introduces substantial computational overhead resulting from iterative agent interactions. Furthermore, engaging in unnecessary debates increases the risk of generating erroneous responses. To address these challenges, we propose Debate Only When Necessary (DOWN), an adaptive multiagent debate framework that selectively activates debate based on the confidence score of the agent's initial response. Debate is activated only for queries requiring further deliberation, during which agents refine their outputs by referencing peer responses and associated confidence scores. Evaluations on benchmarks show that DOWN improves efficiency by up to six times while preserving or even outperforming the performance of existing methods. Further analysis indicates that DOWN effectively mitigates the risk of error propagation stemming from the unnecessary debate process. These findings demonstrate the effectiveness of our approach in delivering high-performance LLM solutions at a lower computational cost.
title Debate Only When Necessary: Adaptive Multiagent Collaboration for Efficient LLM Reasoning
topic Artificial Intelligence
url https://arxiv.org/abs/2504.05047