Beyond Masks: Efficient, Flexible Diffusion Language Models via Deletion-Insertion Processes - Ding, Fangyu; Ding, Ding; Chen, Sijin; Wang, Kaibo; Xu, Peng; Feng, Zijin; Bai, Haoli; Han, Kai; Yan, Youliang; Yuan, Binhang; Sun, Jiacheng (International Conference on Learning Representations, 2026)