LVOmniBench: Pioneering Long Audio-Video Understanding Evaluation for Omnimodal LLMs

LVOmniBench is a new audio-visual understanding evaluation benchmark in long-form audio-video inputs. 🌟

🔥 News

• 2026.03.19 🌟 We are very proud to launch LVOmniBench, the pioneering comprehensive evaluation benchmark of OmniLLMs in Long Audio-Video Understanding Evaluation!

✨ LVOmniBench Introduction

Recent advancements in omnimodal large language models (OmniLLMs) have significantly improved the comprehension of audio and video inputs. However, current evaluations primarily focus on short audio and video clips ranging from 10 seconds to 5 minutes, failing to reflect the demands of real-world applications, where videos typically run for tens of minutes. To address this critical gap, we introduce LVOmniBench, a new benchmark designed specifically for the cross-modal comprehension of long-form audio and video.

• We curated a diverse collection of long videos, with durations ranging from 10 to 90 minutes and an average duration of 2,069s. This duration represents a greater than sixfold increase in temporal scale compared to that of existing benchmarks for audio-visual understanding.

• We manually constructed 1,014 high-quality multiple-choice questions, which are explicitly designed to require joint reasoning across the audio and visual modalities, thereby facilitating a more comprehensive evaluation of OmniLLMs.

• Each QA is ranked by difficulty level, and long audio-video understanding poses significant challenges for both current proprietary and open source models!

🔮 Evaluation

📍 Prompt:

The common prompt used in our evaluation follows this format:

prompt_text = (
    f"Question: {question}\n"
    f"Options:\n{options_str}\n\n"
    "Select the best answer from the options above. "
    "Directly provide the letter representing your choice (A/B/C/D) and nothing else. "
    "Do not include the full text of the option, do not provide any explanation."
)

📍 Leaderboard:

If you want to add your results to our LVOmniBench leaderboard, please contact us at taokeda@westlake.edu.cn