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MileBench: Benchmarking MLLMs in Long Context

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arxiv 2404.18532 v2 pith:DPXU56C5 submitted 2024-04-29 cs.CL cs.AIcs.CVcs.LG

classification cs.CLcs.AIcs.CVcs.LG
keywords mllmslong-contexttasksbenchmarksmultimodalperformancebenchmarkcapabilities
verification ladder T0 review T1 audit T2 compute T3 formal
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Despite the advancements and impressive performance of Multimodal Large Language Models (MLLMs) on benchmarks, their effectiveness in real-world, long-context, and multi-image tasks is unclear due to the benchmarks' limited scope. Existing benchmarks often focus on single-image and short-text samples, and when assessing multi-image tasks, they either limit the image count or focus on specific task (e.g time-series captioning), potentially obscuring the performance challenges of MLLMs. To address these limitations, we introduce MileBench, a pioneering benchmark designed to test the MultImodal Long-contExt capabilities of MLLMs. This benchmark comprises not only multimodal long contexts, but also multiple tasks requiring both comprehension and generation. We establish two distinct evaluation sets, diagnostic and realistic, to systematically assess MLLMs' long-context adaptation capacity and their ability to complete tasks in long-context scenarios. Our experimental results, obtained from testing 22 models, revealed that while the closed-source GPT-4o outperforms others, most open-source MLLMs struggle in long-context situations. Interestingly, the performance gap tends to widen with an increase in the number of images. We strongly encourage an intensification of research efforts towards enhancing MLLMs' long-context capabilities, especially in scenarios involving multiple images.

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Forward citations

Cited by 8 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Evaluating MLLMs with Multimodal Multi-image Reasoning Benchmark

    cs.CV 2025-06 conditional novelty 7.0 of 10

    MMRB is the first benchmark combining multi-image inputs with chain-of-thought reasoning annotations, and its evaluation shows open-source MLLMs trail commercial models while multi-image reward models are unstable.

  2. PMMC: Prospective Multimodal Memory Compilation for Long-Term LVLM Agents

    cs.AI 2026-08 conditional novelty 6.0 of 10

    PMMC compiles prospective questions into verified memory access programs during consolidation, then routes real queries to these frozen programs with a RAG fallback.

  3. Document Haystack: A Long Context Multimodal Image/Document Understanding Vision LLM Benchmark

    cs.CV 2025-07 conditional novelty 6.0 of 10

    A new 400-document, 8,250-question benchmark measures how well vision-language models retrieve hidden text and image facts from long documents.

  4. CoMemo: LVLMs Need Image Context with Image Memory

    cs.CV 2025-06 conditional novelty 6.0 of 10

    CoMemo adds a cross-attention image-memory path and thumbnail-anchored position encoding to reduce visual neglect in long-context and multi-image LVLM tasks.

  5. MadaKV: Adaptive Modality-Perception KV Cache Eviction for Efficient Multimodal Long-Context Inference

    cs.LG 2025-06 conditional novelty 6.0 of 10

    MadaKV adaptively splits the KV cache budget by attention-head modality preference and compensates across layers, cutting cache memory by 80-95% and speeding decoding by 1.3-1.5x with small accuracy loss.

  6. Rethinking Causal Mask Attention for Vision-Language Inference

    cs.CV 2025-05 conditional novelty 6.0 of 10

    Relaxing causal masking so image tokens can preview future image and text context during prefill improves several vision-language benchmarks, and pooling future attention into a single prefix token preserves most of the gain.

  7. CLBench-V: Evaluating Multimodal Context Learning from Grounding to Knowledge Acquisition

    cs.CV 2026-07 conditional novelty 5.0 of 10

    Multimodal context-learning benchmark CLBench-V separates grounding, information application, and knowledge acquisition; the best evaluated model scores 0.2847.

  8. Detecting Hope, Hate, and Emotion in Arabic Textual Speech and Multi-modal Memes Using Large Language Models

    cs.CL 2025-08 unverdicted novelty 3.0 of 10

    The submission cannot be reviewed as a coherent paper: its abstract and full text are two different papers, so the abstract's claims have no supporting body.

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