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Xiangxiang Dai

5 accepted papers

2026

A Multi-Agent Conversational Bandit Approach to Online Evaluation and Selection of User-Aligned LLM Responses

AAAI 2026technical

Prompt-based offline methods are commonly used to optimize large language model (LLM) responses, but evaluating these responses is computationally intensive and often fails to accommodate diverse response styles. This study introduces a novel online evaluation framework that employs a multi-agent co

Cited by 0SourcePDFScholar
2026

Online Multi-LLM Selection via Contextual Bandits Under Unstructured Context Evolution

AAAI 2026technical

Large language models (LLMs) exhibit diverse response behaviors, costs, and strengths, making it challenging to select the most suitable LLM for a given user query. We study the problem of adaptive multi-LLM selection in an online setting, where the learner interacts with users through multi-step qu

Cited by 0SourcePDFScholar
2026

Pull Requests as a Training Signal for Repo-Level Code Editing

ICML 2026poster

Repository-level code editing requires models to understand complex dependencies and execute precise multi-file modifications across a large codebase. While recent gains on SWE-bench rely heavily on complex agent scaffolding, it remains unclear how much of this capability can be internalised via hig…

Cited by 0SourceScholar
2025

Demystifying Online Clustering of Bandits: Enhanced Exploration Under Stochastic and Smoothed Adversarial Contexts

ICLR 2025poster

The contextual multi-armed bandit (MAB) problem is crucial in sequential decision-making. A line of research, known as online clustering of bandits, extends contextual MAB by grouping similar users into clusters, utilizing shared features to improve learning efficiency. However, existing algorithms,…

Cited by 1SourcePDFScholar
2025

Offline Learning for Combinatorial Multi-armed Bandits

ICML 2025poster

The combinatorial multi-armed bandit (CMAB) is a fundamental sequential decision-making framework, extensively studied over the past decade. However, existing work primarily focuses on the online setting, overlooking the substantial costs of online interactions and the readily available offline data…

Cited by 1SourcePDFScholar