Beyond VLM-Based Rewards: Diffusion-Native Latent Reward Modeling. - Gongye Liu; Bo Yang 070; Yida Zhi; Zhizhou Zhong; Lei Ke; Didan Deng; Han Gao 016; Yongxiang Huang; Kaihao Zhang; Hongbo Fu 001; Wenhan Luo (CoRR, 2026)