Recently, GPT-4 with Vision (GPT-4V) has shown remarkable performance across various multimodal tasks. However, its efficacy in emotion recognition remains a question. This paper quantitatively evaluates GPT-4V's capabilities in multimodal emotion understanding, encompassing tasks such as facial emotion recognition, visual sentiment analysis, micro-expression recognition, dynamic facial emotion recognition, and multimodal emotion recognition. Our experiments show that GPT-4V exhibits impressive multimodal and temporal understanding capabilities, even surpassing supervised systems in some tasks. Despite these achievements, GPT-4V is currently tailored for general domains. It performs poorly in micro-expression recognition that requires specialized expertise. The main purpose of this paper is to present quantitative results of GPT-4V on emotion understanding and establish a zero-shot benchmark for future research. Code and evaluation results are available at: https://github.com/zeroQiaoba/gpt4v-emotion.

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