A unified multimodal model can both see images and generate them. So, can it, like a human, inspect its own work after generating it, identify problems, and then make revisions?Researchers from Nanyang Technological University, Shanghai Jiao Tong University, and the University of Tokyo have provided a positive answer. They introduced UMM-Reflection, using reinforcement learning to train complete multi-turn “reflection–revision” trajectories on the open-sou