Fast-dLLM v2: Efficient Block-Diffusion LLM - Wu, Chengyue; Zhang, Hao; Xue, Shuchen; Diao, Shizhe; Fu, Yonggan; Liu, Zhijian; Molchanov, Pavlo; Luo, Ping; Han, Song; Xie, Enze (International Conference on Learning Representations, 2026)