做多模态生成或强化学习对齐的团队值得关注——AlphaGRPO 用分解奖励解决了复杂指令的监督难题，让模型能自我反思修正，直接提升图像生成质量。
AlphaGRPO 是一个将 GRPO 强化学习方法应用于统一多模态模型（UMMs）的新框架，无需冷启动阶段即可增强多模态生成能力。它让模型能够执行推理式文本到图像生成（主动推断用户隐含意图）和自反思优化（自主诊断并修正生成结果中的偏差）。为解决真实场景多模态生成的稳定监督问题，论文提出分解可验证奖励（DVReward），利用 LLM 将复杂请求拆解为原子化、可验证的语义与质量子问题，再由通用 MLLM 评估并提供可解释反馈。实验表明，AlphaGRPO 在 GenEval、TIIF-Bench、DPG-Bench 和 WISE 等基准上取得稳健提升，并在未训练编辑任务的情况下在 GEdit 上获得显著改进。
AlphaGRPO: Unlocking Self-Reflective Multimodal Generation in UMMs via Decompositional Verifiable Reward
In this paper, we propose AlphaGRPO, a novel framework that applies Group Relative Policy Optimization (GRPO) to AR-Diffusion Unified Multimodal Models (UMMs) to enhance multimodal generation capabilities without an additional cold-start stage. Our approach unlocks the model's intrinsic potential to perform advanced reasoning tasks: Reasoning Text-to-Image Generation, where the model actively infers implicit user intents, and Self-Reflective Refinement, where it autonomously diagnoses and corrects misalignments in generated outputs. To address the challenge of providing stable supervision for real-world multimodal generation, we introduce the Decompositional Verifiable Reward (DVReward). Unlike holistic scalar rewards, DVReward utilizes an LLM to decompose complex user requests into atomic, verifiable semantic and quality questions, which are then evaluated by a general MLLM to provide reliable and interpretable feedback. Extensive experiments demonstrate that AlphaGRPO yields robust improvements across multimodal generation benchmarks, including GenEval, TIIF-Bench, DPG-Bench and WISE, while also achieving significant gains in editing tasks on GEdit without training on editing tasks. These results validate that our self-reflective reinforcement approach effectively leverages inherent understanding to guide high-fidelity generation. Project page: https://huangrh99.github.io/AlphaGRPO/