What do vision-language models see in the context? Investigating multimodal in-context learning

• URL: http://arxiv.org/abs/2510.24331v1
• Date: Tue, 28 Oct 2025 11:55:24 GMT
• Title: What do vision-language models see in the context? Investigating multimodal in-context learning
• Authors: Gabriel O. dos Santos, Esther Colombini, Sandra Avila,
• Abstract summary: In-context learning (ICL) enables Large Language Models to learn tasks from demonstration examples without parameter updates.<n>We present a systematic study of ICL in Vision-Language Models (VLMs)<n>We analyze how prompt design, architectural choices, and training strategies influence multimodal ICL.
• Score: 2.1119217917006234
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In-context learning (ICL) enables Large Language Models (LLMs) to learn tasks from demonstration examples without parameter updates. Although it has been extensively studied in LLMs, its effectiveness in Vision-Language Models (VLMs) remains underexplored. In this work, we present a systematic study of ICL in VLMs, evaluating seven models spanning four architectures on three image captioning benchmarks. We analyze how prompt design, architectural choices, and training strategies influence multimodal ICL. To our knowledge, we are the first to analyze how attention patterns in VLMs vary with an increasing number of in-context demonstrations. Our results reveal that training on imag-text interleaved data enhances ICL performance but does not imply effective integration of visual and textual information from demonstration examples. In contrast, instruction tuning improves instruction-following but can reduce reliance on in-context demonstrations, suggesting a trade-off between instruction alignment and in-context adaptation. Attention analyses further show that current VLMs primarily focus on textual cues and fail to leverage visual information, suggesting a limited capacity for multimodal integration. These findings highlight key limitations in the ICL abilities of current VLMs and provide insights for enhancing their ability to learn from multimodal in-context examples.

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