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Peng-Tao Xie

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#artificial intelligence Preprint Sep 2026

JudgeProfile: Understanding and Steering Subjectivity in LLM Judges

LLM judges are inherently subjective, often favoring different responses in pairwise comparison when neither option is objectively wrong. To study this subjectivity, we introduce JudgeProfile, a framework that dissects LLM evaluation into perception (how a judge compares two responses across specific attributes like cl...

Qiong-Qiong Cao, Kang-Ni Liu, Xuan Kan et al. · 0 citations
#artificial intelligence Preprint Sep 2026

AIBuildAI-2.5: Efficient Autonomous AI Model Development Through LLM-Guided Tree Search

Autonomous agents that automatically build artificial intelligence (AI) models could broaden access to AI across science and engineering. A popular line of such agents frames model building as a code search problem and solves it by tree search, in which each node is a candidate program and the tree grows by generating...

Pei-Jia Qin, Rui-Yi Zhang, Qi Cao et al. · 0 citations
#artificial intelligence Preprint Sep 2026

The Missing Complement: State-Conditioned Minimal Sufficient Evidence for Coding Agents

Retrieval assembles repository context by ranking passages for relevance to the current query. A coding agent halfway through an issue has already read much of what such a ranker returns. Relevance is scored per passage, but sufficiency belongs to the set: independently scored passages can fill the budget with support...

Zhe-Xi Feng, Rui-Yi Zhang, Yong-Bo Yang et al. · 0 citations
Preprint Aug 2026

Reconstructing the Right Episode: Evaluating Interleaved Conversational Memory Beyond Long Context

Conversations with chat assistants increasingly span many topics in a single long-running thread, challenging memory systems. Existing long-context and memory benchmarks often expose session or topic boundaries, or probe direct personal-memory questions. These settings understate a harder assistant-memory regime: a fla...

Zhe-Xi Feng, Rui-Yi Zhang, Yong-Bo Yang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

What Matters, When? Diagnosing and Improving Conditional Visual Grounding in Visuomotor Imitation Policies

Visuomotor imitation policies can achieve high performance under in-distribution visual conditions yet fail when visually similar objects or receptacles are introduced. We study this behavior as a problem of conditional visual grounding: the visual target required for successful control changes with the manipulation ph...

Vivek Chavan, Peng-Tao Xie, Ya-Huan Shi et al. · 0 citations
#artificial intelligence Preprint Aug 2026

Can LLMs Take the Pulse of the Economy? A Real-Time Evaluation of LLM Nowcasts on Macroeconomic Indicators

Over six months with four state-of-the-art LLM agents configured with web search, aggregate nowcast accuracy is broadly comparable to the institutional and professional benchmarks, with performance varying widely across individual indicators.

Xin-Yue Zhao, Rui-Yi Zhang, Li-Qin Ye et al. · 1 citation

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