Benchmarking Linguistic Diversity of Large Language Models
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Abstract (arXiv)
The development and evaluation of Large Language Models (LLMs) has primarily focused on their task-solving capabilities, with recent models even surpassing human performance in some areas. However, this focus often neglects whether machine-generated language matches the human level of diversity, in terms of vocabulary choice, syntactic construction, and expression of meaning, raising questions about whether the fundamentals of language generation have been fully addressed. This paper emphasizes the importance of examining the preservation of human linguistic richness by language models, given the concerning surge in online content produced or aided by LLMs. We propose a comprehensive framework for evaluating LLMs from various linguistic diversity perspectives including lexical, syntactic, and semantic dimensions. Using this framework, we benchmark several state-of-the-art LLMs across all diversity dimensions, and conduct an in-depth case study for syntactic diversity. Finally, we analyze how different development and deployment choices impact the linguistic diversity of LLM outputs.
Key facts. Cited by 38 papers in the map (data through 14 Oct 2026). Builds on 57 of its 81 references that are in the map. First posted on arXiv 13 Dec 2024.
Builds on
57 of 81 references.
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- 2026Is Convergence Inevitable? Tracing Output Homogeneity Back to Base Models11 Aug 2026
- 2026Refusal-Gated Decoding: Preserving Refusal Behavior Under High-Temperature Sampling22 Jul 2026
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- 2026Sampling More, Getting Less: Calibration is the Diversity Bottleneck in LLMs11 May 2026
- 2026The TEA Nets framework combines AI and cognitive network science to model targets, events and actors in text30 Apr 2026
- 2026Where does output diversity collapse in post-training?17 Apr 2026
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