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Author

Di Wu

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Preprint Oct 2026

BenchChecker: Assessing the Credibility of Bug-Fixing Benchmarks for LLMs

While Large Language Models (LLMs) show promise for Automatic Program Repair (APR), existing benchmarks suffer from data contamination, in which test samples appear in training sets, artificially inflating performance. To address this, we propose BenchChecker, a framework compatible with both open-source and closed-sou...

Di Wu, Xu He, Shu Wang et al. · 1 citation

MobileGym: A Verifiable and Highly Parallel Simulation Platform for Mobile GUI Agent Research

MobileGym enables two capabilities previously out of reach for everyday apps: verifiable outcome signals through deterministic state-based judging over structured JSON state, and scalable online RL through low-cost parallel rollouts through low-cost parallel rollouts.

Di Wu, Ruitao Hao, Haiyang Wang et al. · 10 citations
Conference Open access 2026

On-policy Reinforcement Fine-tuning with Offline reward for Multi-step Embodied Planning

Experimental results show that ORBIT achieves SOTA performance on EB-ALFRED, outper-forming all closed-source and online-RL-based methods, while being substantially more effi-cient in training speed and computational cost, remaining robust to sub-optimal expert trajectories, and exhibiting strong generalization to unsee...

Di Wu, Jiaxin Fan, Chloe Gu et al. · 1 citation

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