RealChart2Code: Advancing Chart-to-Code Generation with Real Data and Multi-Task Evaluation

Jiajun Zhang; Yuying Li; Zhixun Li; Xingyu Guo; Jingzhuo Wu; Leqi Zheng; Yiran Yang; Jianke Zhang; Qingbin Li; Shannan Yan; Zhetong Li; Changguo Jia; Junfei Wu; Zilei Wang; Qiang Liu; Liang Wang

arXiv · 2603.25804

RealChart2Code: Advancing Chart-to-Code Generation with Real Data and Multi-Task Evaluation

Jiajun Zhang·Yuying Li·Zhixun Li·Xingyu Guo·Jingzhuo Wu·Leqi Zheng·Yiran Yang·Jianke Zhang·Qingbin Li·Shannan Yan·Zhetong Li·Changguo Jia·Junfei Wu·Zilei Wang·Qiang Liu·Liang Wang

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Abstract

Vision-Language Models (VLMs) have demonstrated impressive capabilities in code generation across various domains. However, their ability to replicate complex, multi-panel visualizations from real-world data remains largely unassessed. To address this gap, we introduce \textbf{\texttt{RealChart2Code}}, a new large-scale benchmark with over 2,800 instances grounded in authentic datasets and featuring tasks with clear analytical intent. Crucially, it is the first benchmark to systematically evaluate chart generation from large-scale raw data and assess iterative code refinement in a multi-turn conversational setting. Our comprehensive evaluation of 14 leading VLMs on \texttt{RealChart2Code} reveals significant performance degradation compared to simpler benchmarks, highlighting their struggles with complex plot structures and authentic data. Our analysis uncovers a substantial performance gap between proprietary and open-weight models and confirms that even state-of-the-art VLMs often fail to accurately replicate intricate, multi-panel charts. These findings provide valuable insights into the current limitations of VLMs and guide future research directions. We release the benchmark and code at \url{https://github.com/Speakn0w/RealChart2Code}.

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Jiajun Zhang, Yuying Li, Zhixun Li, Xingyu Guo, Jingzhuo Wu, Leqi Zheng, Yiran Yang, Jianke Zhang, Qingbin Li, Shannan Yan, Zhetong Li, Changguo Jia, Junfei Wu, Zilei Wang, Qiang Liu, Liang Wang. 2026-03-26. RealChart2Code: Advancing Chart-to-Code Generation with Real Data and Multi-Task Evaluation. https://arxiv.org/abs/2603.25804

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