← Search

Fanqi Wan

19 accepted papers

2026

DOCKSMITH: Scaling Reliable Coding Environments via an Agentic Docker Builder

ICML 2026poster

Reliable Docker-based environment construction is a dominant bottleneck for scaling execution-grounded training and evaluation of software engineering agents. We introduce DockSmith, a specialized agentic Docker builder designed to address this challenge. DockSmith treats environment construction no…

Cited by 0SourceScholar
2026

ProFuser: Progressive Fusion of Large Language Models

AAAI 2026technical

While fusing the capacities and advantages of various large language models offers a pathway to construct more powerful and versatile models, a fundamental challenge is to properly select advantageous model during training. Existing fusion methods primarily focus on the training mode that uses cros

Cited by 0SourcePDFScholar
2026

SPELL: Self-Play Reinforcement Learning for Evolving Long-Context Language Models

ICLR 2026poster

Progress in long-context reasoning for large language models (LLMs) has lagged behind other recent advances. This gap arises not only from the intrinsic difficulty of processing long texts, but also from the scarcity of reliable human annotations and programmatically verifiable reward signals. In th…

Cited by 0SourcecodeScholar
2026

SoLoPO: Unlocking Long-Context Capabilities in LLMs via Short-to-Long Preference Optimization

ICLR 2026poster

Despite advances in pretraining with extended context sizes, large language models (LLMs) still face challenges in effectively utilizing real-world long-context information, primarily due to insufficient long-context alignment caused by data quality issues, training inefficiencies, and the lack of w…

Cited by 0SourcecodeScholar
2025

Advantage-Guided Distillation for Preference Alignment in Small Language Models

ICLR 2025spotlight

Alignment techniques enable Large Language Models (LLMs) to generate outputs that align with human preferences and play a crucial role in their effectiveness. However, their impact often diminishes when applied to Small Language Models (SLMs), likely due to the limited capacity of these models. Inst…

2025

BlockPruner: Fine-grained Pruning for Large Language Models

ACL 2025finding

With the rapid growth in the size and complexity of large language models (LLMs), the costs associated with their training and inference have escalated significantly. Research indicates that certain layers in LLMs harbor substantial redundancy, and pruning these layers has minimal impact on the over…

2025

Empowering Self-Learning of LLMs: Inner Knowledge Explicitation as a Catalyst

AAAI 2025technical

Self-learning of Large Language Models (LLMs) facilitates their advancement towards super-intelligence by training with self-synthesized experiences. However, a critical challenge is the amplification of hallucinations in generated data during iterative self-learning, underscoring the need for relia…

2025

Mutual-Taught for Co-adapting Policy and Reward Models

ACL 2025long

During the preference optimization of large language models (LLMs), distribution shifts may arise between newly generated model samples and the data used to train the reward model (RM). This shift reduces the efficacy of the RM, which in turn negatively impacts the performance of the policy model (P…

2025

ReAlign: Structured Revision for Small Language Model Alignment

EMNLP 2025

Aligning small language models with human preferences is challenging, as weak policies struggle to generate informative on-policy samples and suffer from unstable gradients when trained on off-policy signals from stronger models. In this work, we propose ReAlign, a training framework that combines t

2025

Weighted-Reward Preference Optimization for Implicit Model Fusion

ICLR 2025poster

While fusing heterogeneous open-source LLMs with varying architectures and sizes can potentially integrate the strengths of different models, existing fusion methods face significant challenges, such as vocabulary alignment and merging distribution matrices. These procedures are not only complex but…

2024

Knowledge Fusion of Large Language Models

ICLR 2024poster

While training large language models (LLMs) from scratch can generate models with distinct functionalities and strengths, it comes at significant costs and may result in redundant capabilities. Alternatively, a cost-effective and compelling approach is to merge existing pre-trained LLMs into a more…

2024

Knowledge Verification to Nip Hallucination in the Bud

EMNLP 2024main

While large language models (LLMs) have demonstrated exceptional performance across various tasks following human alignment, they may still generate responses that sound plausible but contradict factual knowledge, a phenomenon known as hallucination. In this paper, we demonstrate the feasibility of…

2024

Self-Evolution Fine-Tuning for Policy Optimization

EMNLP 2024finding

The alignment of large language models (LLMs) is crucial not only for unlocking their potential in specific tasks but also for ensuring that responses meet human expectations and adhere to safety and ethical principles. To address the challenges of current alignment methodologies, we introduce self-…

2023

Clustering-Aware Negative Sampling for Unsupervised Sentence Representation

ACL 2023findings

Contrastive learning has been widely studied in sentence representation learning. However, earlier works mainly focus on the construction of positive examples, while in-batch samples are often simply treated as negative examples. This approach overlooks the importance of selecting appropriate negati…

2023

Explore-Instruct: Enhancing Domain-Specific Instruction Coverage through Active Exploration

EMNLP 2023long main

Instruction-tuning can be substantially optimized through enhanced diversity, resulting in models capable of handling a broader spectrum of tasks. However, existing data employed for such tuning often exhibit an inadequate coverage of individual domains, limiting the scope for nuanced comprehension…

Cited by 0SourcecodeScholar
2023

Multi-Grained Knowledge Retrieval for End-to-End Task-Oriented Dialog

ACL 2023long

Retrieving proper domain knowledge from an external database lies at the heart of end-to-end task-oriented dialog systems to generate informative responses. Most existing systems blend knowledge retrieval with response generation and optimize them with direct supervision from reference responses, le…

2023

PsyCoT: Psychological Questionnaire as Powerful Chain-of-Thought for Personality Detection

EMNLP 2023long findings

Recent advances in large language models (LLMs), such as ChatGPT, have showcased remarkable zero-shot performance across various NLP tasks. However, the potential of LLMs in personality detection, which involves identifying an individual's personality from their written texts, remains largely unexpl…

Cited by 0SourcecodeScholar
2023

Retrieval-Generation Alignment for End-to-End Task-Oriented Dialogue System

EMNLP 2023long main

Developing an efficient retriever to retrieve knowledge from a large-scale knowledge base (KB) is critical for task-oriented dialogue systems to effectively handle localized and specialized tasks. However, widely used generative models such as T5 and ChatGPT often struggle to differentiate subtle di…

Cited by 0SourcecodeScholar