Xuerui Qiu, Yutao Cui, Guozhen Zhang, Junzhe Li, JiaKui Hu, Xiao Zhang, Yang Li, Songtao Liu, Miles Yang, Yu Shi, Zhao Zhong, Liefeng Bo: HYDRA: Unifying Multi-modal Generation and Understanding via Representation-Harmonized Tokenization. CoRR abs/2603.15228 (2026)