UniWorld
modelPKU-YuanGroup's unified understanding+generation line: UniWorld-V1 (June 2025) builds joint visual understanding, generation, and editing on high-resolution semantic encoders; UniWorld-V2 / Edit-R1 (Oct 2025) adds RL post-training for image editing via diffusion negative-aware finetuning with implicit MLLM feedback. Fed by the group's ImgEdit unified image-editing dataset+benchmark (NeurIPS 2025 D&B).