OmnixR: Evaluating Omni-modality Language Models on Reasoning across Modalities - Chen, Lichang; Hu, Hexiang; Zhang, Mingda; Chen, Yiwen; Wang, Zifeng; LI, YANDONG; Shyam, Pranav; Zhou, Tianyi; Huang, Heng; Yang, Ming-Hsuan; Gong, Boqing (International Conference on Learning Representations, 2025)