OptMerge: Unifying Multimodal LLM Capabilities and Modalities via Model Merging - Wei, Yongxian; Cheng, Runxi; Jin, Weike; Yang, Enneng; Shen, Li; HOU, LU; Du, SiNan; Yuan, Chun; Cao, Xiaochun; Tao, Dacheng (International Conference on Learning Representations, 2026)