Arnold Overwijk

Engineering Manager, Meta

2 papers at NeurIPS 2025

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Poster Session 1

2 papers

Wednesday, December 3, 2025 · 11:00 AM → 2:00 PM

Exhibit Hall C,D,E

Group-Level Data Selection for Efficient Pretraining

#100 · Zichun Yu, Fei Peng, Jie Lei, Arnold Overwijk, Wen-tau Yih, Chenyan Xiong

We present Group-MATES, an efficient group-level data selection method that optimizes the speed-quality frontier for LLM pretraining. On DCLM, Group-MATES achieves up to 9.4% relative accuracy gain and 1.75× faster training than random selection.

ORBIT - Open Recommendation Benchmark for Reproducible Research with Hidden Tests

#201 · Jingyuan He, Jiongnan Liu, Vishan Vishesh Oberoi, Bolin Wu, Mahima Jagadeesh Patel, Kangrui Mao, Chuning Shi, I-Ta Lee, Arnold Overwijk, Chenyan Xiong