R1-VL: Learning to Reason with Multimodal Large Language Models via Step-wise Group Relative Policy Optimization

Fuente: arXiv
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Auteurs principaux: Zhang, Jingyi, Huang, Jiaxing, Yao, Huanjin, Liu, Shunyu, Zhang, Xikun, Lu, Shijian, Tao, Dacheng
Format: Preprint
Publié: 2025
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author Zhang, Jingyi
Huang, Jiaxing
Yao, Huanjin
Liu, Shunyu
Zhang, Xikun
Lu, Shijian
Tao, Dacheng
author_facet Zhang, Jingyi
Huang, Jiaxing
Yao, Huanjin
Liu, Shunyu
Zhang, Xikun
Lu, Shijian
Tao, Dacheng
contents Recent studies generally enhance MLLMs' reasoning capabilities via supervised fine-tuning on high-quality chain-of-thought reasoning data, which often leads models to merely imitate successful reasoning paths without understanding what the wrong reasoning paths are. In this work, we aim to enhance the MLLMs' reasoning ability beyond passively imitating positive reasoning paths. To this end, we design Step-wise Group Relative Policy Optimization (StepGRPO), a new online reinforcement learning framework that enables MLLMs to self-improve reasoning ability via simple, effective and dense step-wise rewarding. Specifically, StepGRPO introduces two novel rule-based reasoning rewards: Step-wise Reasoning Accuracy Reward (StepRAR) and Step-wise Reasoning Validity Reward (StepRVR). StepRAR rewards the reasoning paths that contain necessary intermediate reasoning steps via a soft key-step matching technique, while StepRAR rewards reasoning paths that follow a well-structured and logically consistent reasoning process through a reasoning completeness and logic evaluation strategy. With the proposed StepGRPO, we introduce R1-VL, a series of MLLMs with outstanding capabilities in step-by-step reasoning. Extensive experiments over 8 benchmarks demonstrate the superiority of our methods.
format Preprint
id arxiv_https___arxiv_org_abs_2503_12937
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle R1-VL: Learning to Reason with Multimodal Large Language Models via Step-wise Group Relative Policy Optimization
Zhang, Jingyi
Huang, Jiaxing
Yao, Huanjin
Liu, Shunyu
Zhang, Xikun
Lu, Shijian
Tao, Dacheng
Artificial Intelligence
Computation and Language
Computer Vision and Pattern Recognition
Machine Learning
Recent studies generally enhance MLLMs' reasoning capabilities via supervised fine-tuning on high-quality chain-of-thought reasoning data, which often leads models to merely imitate successful reasoning paths without understanding what the wrong reasoning paths are. In this work, we aim to enhance the MLLMs' reasoning ability beyond passively imitating positive reasoning paths. To this end, we design Step-wise Group Relative Policy Optimization (StepGRPO), a new online reinforcement learning framework that enables MLLMs to self-improve reasoning ability via simple, effective and dense step-wise rewarding. Specifically, StepGRPO introduces two novel rule-based reasoning rewards: Step-wise Reasoning Accuracy Reward (StepRAR) and Step-wise Reasoning Validity Reward (StepRVR). StepRAR rewards the reasoning paths that contain necessary intermediate reasoning steps via a soft key-step matching technique, while StepRAR rewards reasoning paths that follow a well-structured and logically consistent reasoning process through a reasoning completeness and logic evaluation strategy. With the proposed StepGRPO, we introduce R1-VL, a series of MLLMs with outstanding capabilities in step-by-step reasoning. Extensive experiments over 8 benchmarks demonstrate the superiority of our methods.
title R1-VL: Learning to Reason with Multimodal Large Language Models via Step-wise Group Relative Policy Optimization
topic Artificial Intelligence
Computation and Language
Computer Vision and Pattern Recognition
Machine Learning
url https://arxiv.org/abs/2503.12937