
Hierarchical Token GRPO integrates sketch-then-paint stages and hierarchical credit assignment into diffusion multi-modal LLM reinforcement learning, substantially improving image quality and benchmark scores.
Siqi Luo, Jianghan Shen, Yi Xin, Huayu Zheng and 8 more
Sydney Poster Session 5, Thu, Dec 10, 10:00 AM–1:00 PM, Hall 1-4 · Published 2026
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