collaborators

9 papers

cs.CL2026

Which Models Are Our Models Built On? Auditing Invisible Dependencies in Modern LLMs

Sanjay Adhikesaven, Haoxiang Sun, Sewon Min

Modern LLM training pipelines increasingly rely on other models to generate data, filter corpora, judge outputs, and guide development decisions. These dependencies are recursive:…

cs.IR2026

RAG over Thinking Traces Can Improve Reasoning Tasks

Negar Arabzadeh, Wenjie Ma, Sewon Min +1

Retrieval-augmented generation (RAG) has proven effective for knowledge-intensive tasks, but is widely believed to offer limited benefit for reasoning-intensive problems such as ma…

cs.IR2026

PIXELRAG: Web Screenshots Beat Text for Retrieval-Augmented Generation

Yichuan Wang, Zhifei Li, Zirui Wang +5

Augmenting large language models (LLMs) with retrieved web text has become a dominant paradigm, yet the web is not natively textual: existing systems depend on complex parsing pipe…

cs.CL2026

What's In My Human Feedback? Learning Interpretable Descriptions of Preference Data

Rajiv Movva, Smitha Milli, Sewon Min +1

Human feedback can alter language models in unpredictable and undesirable ways, as practitioners lack a clear understanding of what feedback data encodes. While prior work studies…

cs.CL2026

Reliable Fine-Grained Evaluation of Natural Language Math Proofs

Wenjie Ma, Andrei Cojocaru, Neel Kolhe +6

Recent advances in large language models (LLMs) for mathematical reasoning have largely focused on tasks with easily verifiable final answers while generating and verifying natural…

cs.LG2025

FrontierCS: Evolving Challenges for Evolving Intelligence

Qiuyang Mang, Wenhao Chai, Zhifei Li +48

We introduce FrontierCS, a benchmark of 156 open-ended problems across diverse areas of computer science, designed and reviewed by experts, including CS PhDs and top-tier competiti…