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Weiwen Xu

16 accepted papers

2025

Auto-Arena: Automating LLM Evaluations with Agent Peer Battles and Committee Discussions

ACL 2025long

As LLMs continuously evolve, there is an urgent need for a reliable evaluation method that delivers trustworthy results promptly. Currently, static benchmarks suffer from inflexibility and unreliability, leading users to prefer human voting platforms like Chatbot Arena. However, human evaluations re…

2025

Can We Further Elicit Reasoning in LLMs? Critic-Guided Planning with Retrieval-Augmentation for Solving Challenging Tasks

ACL 2025long

Large language models excel at problem-solving but often struggle with complex reasoning and factual accuracy. While chain-of-thought and retrieval-augmented generation help break down problems and retrieve knowledge, they still falter on challenging tasks like competitive programming due to frequen…

2025

Chain of Ideas: Revolutionizing Research Via Novel Idea Development with LLM Agents

EMNLP 2025

Research ideation is crucial for scientific progress, but the exponential increase in scientific literature makes it challenging to stay updated and identify impactful directions. Recent developments in large language models(LLMs) offer a promising avenue to automate this process. However, existing

2025

FineReason: Evaluating and Improving LLMs’ Deliberate Reasoning through Reflective Puzzle Solving

ACL 2025long

Many challenging reasoning tasks require not just rapid, intuitive responses, but a more deliberate, multi-step approach. Recent progress in large language models (LLMs) highlights an important shift from the “System 1” way of quick reactions to the “System 2” style of reflection-and-correction prob…

2025

GeoPQA: Bridging the Visual Perception Gap in MLLMs for Geometric Reasoning

EMNLP 2025

Recent advancements in reinforcement learning (RL) have enhanced the reasoning abilities of large language models (LLMs), yet the impact on multimodal LLMs (MLLMs) is limited. Particularly in vision-intensive tasks like geometric reasoning, MLLMs hallucinate frequently, leading to inaccurate reasoni

2025

ReasonMed: A 370K Multi-Agent Generated Dataset for Advancing Medical Reasoning

EMNLP 2025

Reasoning-based large language models have excelled in mathematics and programming, yet their potential in knowledge-intensive medical question answering remains underexplored and insufficiently validated in clinical contexts. To bridge this gap, we introduce ReasonMed , the largest medical reasonin

2025

Scaling Language-centric Omnimodal Representation Learning

NeurIPS 2025poster

Recent multimodal embedding approaches leveraging multimodal large language models (MLLMs) fine-tuned with contrastive learning (CL) have shown promising results, yet the underlying reasons behind their superiority remain underexplored. This work argues that a crucial advantage of MLLM-based approac…

Cited by 0SourcecodeScholar
2025

SeaLLMs 3: Open Foundation and Chat Multilingual Large Language Models for Southeast Asian Languages

NAACL 2025system demonstrations

Large Language Models (LLMs) have shown remarkable abilities across various tasks, yet their development has predominantly centered on high-resource languages like English and Chinese, leaving low-resource languages underserved. To address this disparity, we present SeaLLMs 3, the latest iteration o…

2024

Reasoning Paths Optimization: Learning to Reason and Explore From Diverse Paths

EMNLP 2024finding

Advanced models such as OpenAI o1 exhibit impressive problem-solving capabilities through step-by-step reasoning. However, they may still falter on more complex problems, making errors that disrupt their reasoning paths. We attribute this to the expansive solution space, where each step has the risk…

2024

Reasons to Reject? Aligning Language Models with Judgments

ACL 2024findings

As humans, we consistently interact with our peers and receive feedback in the form of natural language. This language feedback allows us to maintain appropriate behavior, and rectify potential errors. The question arises naturally: can we use language feedback to align large language models (LLMs)?…

2023

From Cloze to Comprehension: Retrofitting Pre-trained Masked Language Models to Pre-trained Machine Reader

NeurIPS 2023poster

We present Pre-trained Machine Reader (PMR), a novel method for retrofitting pre-trained masked language models (MLMs) to pre-trained machine reading comprehension (MRC) models without acquiring labeled data. PMR can resolve the discrepancy between model pre-training and downstream fine-tuning of ex…

Cited by 4SourcePDFScholar
2023

PeerDA: Data Augmentation via Modeling Peer Relation for Span Identification Tasks

ACL 2023long

Span identification aims at identifying specific text spans from text input and classifying them into pre-defined categories. Different from previous works that merely leverage the Subordinate (SUB) relation (i.e. if a span is an instance of a certain category) to train models, this paper for the fi…

2022

ConReader: Exploring Implicit Relations in Contracts for Contract Clause Extraction

EMNLP 2022main

We study automatic Contract Clause Extraction (CCE) by modeling implicit relations in legal contracts. Existing CCE methods mostly treat contracts as plain text, creating a substantial barrier to understanding contracts of high complexity. In this work, we first comprehensively analyze the complexit…

2021

Addressing the Vulnerability of NMT in Input Perturbations

NAACL 2021industry

Neural Machine Translation (NMT) has achieved significant breakthrough in performance but is known to suffer vulnerability to input perturbations. As real input noise is difficult to predict during training, robustness is a big issue for system deployment. In this paper, we improve the robustness of…

2021

Exploiting Reasoning Chains for Multi-hop Science Question Answering

EMNLP 2021finding

We propose a novel Chain Guided Retriever-reader (CGR) framework to model the reasoning chain for multi-hop Science Question Answering. Our framework is capable of performing explainable reasoning without the need of any corpus-specific annotations, such as the ground-truth reasoning chain, or human…