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Haoyang Fang

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#machine learning Preprint Sep 2026

Mitra-v2 Technical Report

We introduce Mitra-v2, a tabular foundation model that delivers state-of-the-art performance on real-world classification and regression problems, from credit-risk scoring and clinical prediction to equipment-failure detection and house-price estimation. Mitra-v2 is trained only on synthetic data, with a pretraining di...

Ye-Fan Tao, Xi-Yuan Zhang, Xin-Yi Liu et al. · 3 citations · ⚡1
Preprint Aug 2026

Exploit More, Explore Smarter for Budget-Constrained Agentic Search

This work introduces ExTS, a tree-search policy that treats expansion itself as a value-of-information decision, and introduces pilot-run diagnostics that characterize what makes budget-constrained agentic search problems structurally different from one another, providing both understanding of the problem space and pra...

Haoyang Fang, Bernie Wang · 2 citations

LLMZero: Discovering Adaptive Training Strategies for RL Post-Training via LLM Agents

LLMZero, an agentic system that optimizes training trajectories via tree search by diagnosing pathologies at each checkpoint and proposing coordinated multi-parameter transitions, discovers strategies that improve over the base model and over grid search and over grid search, consistently outperforming random search an...

Haoyang Fang, Wei Zhu, Boran Han et al. · 2 citations

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