MixEval-X: Any-to-any Evaluations from Real-world Data Mixture - Ni, Jinjie; Song, Yifan; Ghosal, Deepanway; Li, Bo; Zhang, David Junhao; Yue, Xiang; Xue, Fuzhao; Deng, Yuntian; Zheng, Andy; Zhang, Kaichen; Shah, Mahir; Jain, Kabir; et al. (International Conference on Learning Representations, 2025)