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MCBench introduces a critical evaluation framework for Omni LLMs by testing their ability to integrate vision, audio, and text for safety judgments, revealing that current models struggle with subtle, non-physical risks despite strong performance on salient cues. The study highlights a fundamental gap in cross-modal reasoning where models fail to effectively synthesize extracted information for safety-critical decisions. This finding underscores the necessity for architectural improvements and training strategies specifically designed to enhance robustness in multimodal safety scenarios.
MCBench: A Multicontext Safety Assessment Benchmark for Omni Large Language Models
arXiv:2606.05177v1 Announce Type: cross Abstract: Existing multimodal safety benchmarks focus solely on visual inputs and cannot assess Omni Large Language Models (LLMs) that process vision, audio, and text. We introduce MCBench, a benchmark with 1196 scenarios spanning four safety categories that require integrating multiple modalities for accurate safety assessment. Each unsafe scenario is paired with a minimally different safe counterpart to assess model sensitivity. Our evaluations of state-of-the-art models reveal significant challenges. Omni LLMs struggle with subtle or non-physical risks but perform better when salient visual or acoustic cues are present. Analysis of reasoning traces shows that, although models can extract modality-specific information, they often fail to integrate these cues effectively for safety judgments. Our findings reveal that current Omni LLMs lack robust cross-modal reasoning in safety-critical settings, underscoring the need for improved architectures and training strategies for multimodal safety.
Abstract:Existing multimodal safety benchmarks focus solely on visual inputs and cannot assess Omni Large Language Models (LLMs) that process vision, audio, and text. We introduce MCBench, a benchmark with 1196 scenarios spanning four safety categories that require integrating multiple modalities for accurate safety assessment. Each unsafe scenario is paired with a minimally different safe counterpart to assess model sensitivity. Our evaluations of state-of-the-art models reveal significant challenges. Omni LLMs struggle with subtle or non-physical risks but perform better when salient visual or acoustic cues are present. Analysis of reasoning traces shows that, although models can extract modality-specific information, they often fail to integrate these cues effectively for safety judgments. Our findings reveal that current Omni LLMs lack robust cross-modal reasoning in safety-critical settings, underscoring the need for improved architectures and training strategies for multimodal safety.
Computation and Language (cs.CL); Artificial Intelligence (cs.AI); Audio and Speech Processing (eess.AS)
arXiv:2606.05177 [cs.CL]
(or arXiv:2606.05177v1 [cs.CL] for this version)
https://doi.org/10.48550/arXiv.2606.05177 Focus to learn more arXiv-issued DOI via DataCite
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