Video-MME-Logical: A Controlled Diagnostic Benchmark for Video Temporal-Logical Reasoning

Hohin Kwan, Hongyu Li, Renrui Zhang, Manyuan Zhang, Xianghao Kong, Anyi Rao, Jiahao Xie, Si Liu


Abstract
Recent interest in multimodal large language models (MLLMs) raises a central question: can they reason over dynamic visual evidence rather than merely recognize objects or events in individual frames? This ability, which we refer to as *video temporal-logical reasoning*, requires models to maintain, update, and compose evidence as visual states evolve across frames. Existing video benchmarks often conflate this capability with scene complexity, static recognition, or uncontrolled temporal variation. To isolate this capability, we introduce Video-MME-Logical, a controlled benchmark organized around five temporal-logical operations: state tracking, sequential counting, temporal ordering, dynamic spatiality, and structural composition. The benchmark contains 25 fine-grained task categories generated with controlled object states, transitions, temporal dependencies, and logical compositions. It enables difficulty-controlled final-answer evaluation by varying temporal horizon and reasoning complexity, and supports intermediate-state diagnostics by verifying whether models recover the required logical reasoning trace before producing the final answer. Experiments with state-of-the-art MLLMs reveal a substantial human-model gap, especially as temporal-logical complexity increases. Supervised fine-tuning on up to 500K generated samples improves performance but remains insufficient to close the reasoning gap, positioning Video-MME-Logical as a scalable testbed for analyzing and improving temporal-logical reasoning in MLLMs.
Anthology ID:
2026.findings-emnlp.423
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2026
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
Findings
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
8900–8919
Language:
URL:
https://aclanthology.org/2026.findings-emnlp.423/
DOI:
Bibkey:
Cite (ACL):
Hohin Kwan, Hongyu Li, Renrui Zhang, Manyuan Zhang, Xianghao Kong, Anyi Rao, Jiahao Xie, and Si Liu. 2026. Video-MME-Logical: A Controlled Diagnostic Benchmark for Video Temporal-Logical Reasoning. In Findings of the Association for Computational Linguistics: EMNLP 2026, pages 8900–8919, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Video-MME-Logical: A Controlled Diagnostic Benchmark for Video Temporal-Logical Reasoning (Kwan et al., Findings 2026)
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PDF:
https://aclanthology.org/2026.findings-emnlp.423.pdf