LongGenBench: Benchmarking Long-Form Generation in Long Context LLMs

• URL: http://arxiv.org/abs/2409.02076v7
• Date: Thu, 23 Jan 2025 00:52:08 GMT
• Title: LongGenBench: Benchmarking Long-Form Generation in Long Context LLMs
• Authors: Yuhao Wu, Ming Shan Hee, Zhiqing Hu, Roy Ka-Wei Lee,
• Abstract summary: LongGenBench is a novel benchmark designed to rigorously evaluate large language models' ability to generate long text. It evaluates model performance across four distinct scenarios, three instruction types, and two generation-lengths (16K and 32K tokens) Our evaluation of ten state-of-the-art LLMs reveals that, despite strong results on Ruler, all models struggled with long text generation on LongGenBench.
• Score: 4.4965596747053
• License:
• Abstract: Current benchmarks like Needle-in-a-Haystack (NIAH), Ruler, and Needlebench focus on models' ability to understand long-context input sequences but fail to capture a critical dimension: the generation of high-quality long-form text. Applications such as design proposals, technical documentation, and creative writing rely on coherent, instruction-following outputs over extended sequences - a challenge that existing benchmarks do not adequately address. To fill this gap, we introduce LongGenBench, a novel benchmark designed to rigorously evaluate large language models' (LLMs) ability to generate long text while adhering to complex instructions. Through tasks requiring specific events or constraints within generated text, LongGenBench evaluates model performance across four distinct scenarios, three instruction types, and two generation-lengths (16K and 32K tokens). Our evaluation of ten state-of-the-art LLMs reveals that, despite strong results on Ruler, all models struggled with long text generation on LongGenBench, particularly as text length increased. This suggests that current LLMs are not yet equipped to meet the demands of real-world, long-form text generation.

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