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The rapid advancement of large language models (LLMs) has significantly improved code completion tasks, yet the trade-off between accuracy and computational cost remains a critical challenge. While using larger models and incorporating…

Software Engineering · Computer Science 2025-02-17 Boyuan Chen , Mingzhi Zhu , Brendan Dolan-Gavitt , Muhammad Shafique , Siddharth Garg

Large language models (LLMs) can enhance factuality via retrieval-augmented generation (RAG), but applying RAG to every query is unnecessary when the model-only answer is reliable. This motivates cascaded RAG: each query is first handled by…

Computation and Language · Computer Science 2026-05-20 Zijun Jia , Yuanchang Ye , Sen Jia , Yiyao Qian , Haoning Wang , Baojie Chen , Diyin Tang , Jinsong Yu , Zhiyuan Wang

Multi-agent LLM systems improve reasoning by combining outputs from multiple agents, but interaction-heavy methods can introduce error propagation and high communication overhead. When agents exchange raw responses or reasoning traces,…

Artificial Intelligence · Computer Science 2026-05-26 Yi Li , Songtao Wei , Dongming Jiang , Zhichun Guo , Qiannan Li , Bingzhe Li

To mitigate the trade-offs between performance and costs, LLM providers route user tasks to different models based on task difficulty and latency. We study the effect of LLM routing with respect to user behavior. We propose a game between…

Computer Science and Game Theory · Computer Science 2026-02-11 Rafid Mahmood

We develop a framework for studying and quantifying the risk of cascading failures in time-delay consensus networks, motivated by a team of agents attempting temporal rendezvous under stochastic disturbances and communication delays. To…

Systems and Control · Electrical Eng. & Systems 2026-04-08 Guangyi Liu , Vivek Pandey , Christoforos Somarakis , Nader Motee

Large Language Model-based Multi-Agent Systems (LLM-MAS) are increasingly applied to complex collaborative scenarios. However, their collaborative mechanisms may cause minor inaccuracies to gradually solidify into system-level false…

Multiagent Systems · Computer Science 2026-05-12 Yizhe Xie , Congcong Zhu , Xinyue Zhang , Tianqing Zhu , Dayong Ye , Minfeng Qi , Huajie Chen , Wanlei Zhou

Cascade systems comprise a two-model sequence, with a lightweight model processing all samples and a heavier, higher-accuracy model conditionally refining harder samples to improve accuracy. By placing the light model on the device side and…

Machine Learning · Computer Science 2023-06-23 Sokratis Nikolaidis , Stylianos I. Venieris , Iakovos S. Venieris

Multi-agent debate improves LLM reasoning, yet agreement among agents is not evidence of correctness. When agents converge on a wrong answer through social reinforcement, consensus-based stopping commits that error to an automated action…

Artificial Intelligence · Computer Science 2026-04-10 Mengdie Flora Wang , Haochen Xie , Guanghui Wang , Aijing Gao , Guang Yang , Ziyuan Li , Qucy Wei Qiu , Fangwei Han , Hengzhi Qiu , Yajing Huang , Bing Zhu , Jae Oh Woo

Current large language models (LLMs) excel in verifiable domains where outputs can be checked before action but prove less reliable for high-stakes strategic decisions with uncertain outcomes. This gap, driven by mutually reinforcing…

Artificial Intelligence · Computer Science 2025-11-12 Alejandro R. Jadad

Large Language Models (LLMs) have demonstrated advanced capabilities but often suffer from factual inaccuracies (hallucinations) and systematic biases. These issues, sometimes amplified in specific architectures like Mixture-of-Experts…

Computation and Language · Computer Science 2026-04-28 Shuai Wu , Xue Li , Yanna Feng , Yufang Li , Zhijun Wang , Ran Wang

Large-language models (LLMs) have demonstrated powerful problem-solving capabilities, in particular when organized in multi-agent systems. However, the advent of such systems also raises several questions on the ability of a complex network…

Multiagent Systems · Computer Science 2025-07-14 Florian Grötschla , Luis Müller , Jan Tönshoff , Mikhail Galkin , Bryan Perozzi

Modern database systems allow users to query or process unstructured text or document columns using LLM-powered functions. Users can express an operation in natural language (e.g., "identify if this review mentions billing issues"), with…

Databases · Computer Science 2026-01-12 Shreya Shankar , Sepanta Zeighami , Aditya Parameswaran

Large Language Model (LLM) agent systems have advanced rapidly, driven by their strong generalization in zero-shot settings. To further enhance reasoning and accuracy on complex tasks, Multi-Agent Debate (MAD) has emerged as a promising…

Computation and Language · Computer Science 2025-12-03 Wei Fan , JinYi Yoon , Bo Ji

Effective automation hinges on deciding when to act and when to escalate. We model this as a decision under uncertainty: an LLM forms a prediction, estimates its probability of being correct, and compares the expected costs of acting and…

Machine Learning · Computer Science 2026-04-13 Matthew DosSantos DiSorbo , Harang Ju

Multi-agent debate (MAD) systems improve LLM reasoning through iterative deliberation, but remain vulnerable to debate collapse, a failure type where final agent decisions are compromised on erroneous reasoning. Existing methods lack…

Multiagent Systems · Computer Science 2026-02-10 Luoxi Tang , Yuqiao Meng , Joseph Costa , Yingxue Zhang , Muchao Ye , Zhaohan Xi

Large language model (LLM) agents currently depend on predefined tools or early-stage tool generation, limiting their adaptability and scalability to complex scientific tasks. We introduce CASCADE, a self-evolving agentic framework…

Artificial Intelligence · Computer Science 2026-01-29 Xu Huang , Junwu Chen , Yuxing Fei , Zhuohan Li , Philippe Schwaller , Gerbrand Ceder

LLM cascades deploy small LLMs to answer most queries, limiting the use of large and expensive LLMs to difficult queries. This approach can significantly reduce costs without impacting performance. However, risk-sensitive domains such as…

Artificial Intelligence · Computer Science 2025-04-01 Michael J. Zellinger , Rex Liu , Matt Thomson

Foundation models are becoming valuable tools in medicine. Yet despite their promise, the best way to leverage Large Language Models (LLMs) in complex medical tasks remains an open question. We introduce a novel multi-agent framework, named…

Computation and Language · Computer Science 2024-10-31 Yubin Kim , Chanwoo Park , Hyewon Jeong , Yik Siu Chan , Xuhai Xu , Daniel McDuff , Hyeonhoon Lee , Marzyeh Ghassemi , Cynthia Breazeal , Hae Won Park

Scalable oversight protocols aim to enable humans to accurately supervise superhuman AI. In this paper we study debate, where two AI's compete to convince a judge; consultancy, where a single AI tries to convince a judge that asks…

LLM cascades and model routing promise lower inference cost by sending easy queries to a small model and escalating hard ones to a large model, but most deployed routers use uncalibrated confidence scores and require per-workload threshold…

Machine Learning · Computer Science 2026-05-20 Varun Kotte