Efficient Multimodal Planning Agent for Visual Question-Answering

Zhuo Chen, Xinyu Geng, Xinyu Wang, Yong Jiang, Zhen Zhang, Pengjun Xie, Kewei Tu


Abstract
Visual Question-Answering (VQA) is a challenging multimodal task that requires integrating visual and textual information to generate accurate responses. While multimodal Retrieval-Augmented Generation (mRAG) has shown promise in enhancing VQA systems by providing more evidence on both image and text sides, the default procedure that addresses VQA queries, especially the knowledge-intensive ones, often relies on multi-stage pipelines of mRAG with inherent dependencies. To mitigate the inefficiency limitations while maintaining VQA task performance, this paper proposes a method that trains a multimodal planning agent, dynamically decomposing the mRAG pipeline to solve the VQA task. Our method optimizes the trade-off between efficiency and effectiveness by training the agent to intelligently determine the necessity of each mRAG step. In our experiments, the agent can help reduce redundant computations, cutting search time by over 60% compared to existing methods and decreasing costly tool calls. Meanwhile, experiments demonstrate that our method outperforms all baselines, including a Deep Research agent and a carefully designed prompt-based method, on average over six various datasets. Code is released.
Anthology ID:
2026.findings-aacl.239
Volume:
Findings of the Association for Computational Linguistics: IJCNLP-AACL 2026
Month:
November
Year:
2026
Address:
Hengqin, China
Editors:
Yue Zhang, Ruifeng Xu, Ayu Purwarianti, Tong Rong, Jun Suzuki
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
4698–4718
Language:
URL:
https://aclanthology.org/2026.findings-aacl.239/
DOI:
Bibkey:
Cite (ACL):
Zhuo Chen, Xinyu Geng, Xinyu Wang, Yong Jiang, Zhen Zhang, Pengjun Xie, and Kewei Tu. 2026. Efficient Multimodal Planning Agent for Visual Question-Answering. In Findings of the Association for Computational Linguistics: IJCNLP-AACL 2026, pages 4698–4718, Hengqin, China. Association for Computational Linguistics.
Cite (Informal):
Efficient Multimodal Planning Agent for Visual Question-Answering (Chen et al., Findings 2026)
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PDF:
https://aclanthology.org/2026.findings-aacl.239.pdf