CNNSum: Exploring Long-Context Summarization with Large Language Models in Chinese Novels

• URL: http://arxiv.org/abs/2412.02819v4
• Date: Tue, 17 Dec 2024 16:03:43 GMT
• Title: CNNSum: Exploring Long-Context Summarization with Large Language Models in Chinese Novels
• Authors: Lingxiao Wei, He Yan, Xiangju Lu, Junmin Zhu, Jun Wang, Wei Zhang,
• Abstract summary: CNNSum is a benchmark for long-context summarization based on Chinese novels. It features four subsets totaling 695 samples, with lengths ranging from 16k to 128k. We conduct experiments to explore and improve long-context summarization.
• Score: 11.614599448394374
• License:
• Abstract: Large Language Models (LLMs) have been well-researched in various long-context tasks. However, the scarcity of high-quality long-context summarization datasets has hindered further advancements in this area. To address this, we introduce CNNSum, a multi-scale long-context summarization benchmark based on Chinese novels, featuring human-driven annotations, which comprises four subsets totaling 695 samples, with lengths ranging from 16k to 128k. We evaluate numerous LLMs and conduct detailed case analyses. Furthermore, we conduct extensive fine-tuning experiments to explore and improve long-context summarization. In our study: (1) Advanced LLMs like GPT-4o may still generate subjective commentary, leading to vague summaries. (2) Currently, long-context summarization mainly relies on memory ability afforded by longer context lengths. The advantages of Large LLMs are hard to utilize, thus small LLMs are the most cost-effective. (3) Different prompt templates paired with various version models may cause large performance gaps. In further fine-tuning, these can be mitigated, and the Base version models perform better. (4) LLMs with RoPE-base scaled exhibit strong extrapolation potential; using short-context data can significantly improve long-context summarization performance. However, further applying other interpolation methods requires careful selection. (5) CNNSum provides more reliable and insightful evaluation results than other benchmarks. We release CNNSum to advance future research in this field. https://github.com/CxsGhost/CNNSum

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