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Main Authors: Cui, Jiaxin, Alexander, Rohan
Format: Preprint
Published: 2026
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Online Access:https://arxiv.org/abs/2602.14349
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author Cui, Jiaxin
Alexander, Rohan
author_facet Cui, Jiaxin
Alexander, Rohan
contents We systematically evaluate the reproducibility of data analysis conducted by Large Language Models (LLMs). We evaluate two prompting strategies, six models, and four temperature settings, with ten independent executions per configuration, yielding 480 total attempts. We assess the completion, concordance, validity, and consistency of each attempt and find considerable variation in the analytical results even for consistent configurations. This suggests, as with human data analysis, the data analysis conducted by LLMs can vary, even given the same task, data, and settings. Our results mean that if an LLM is being used to conduct data analysis, then it should be run multiple times independently and the distribution of results considered.
format Preprint
id arxiv_https___arxiv_org_abs_2602_14349
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Same Prompt, Different Outcomes: Evaluating the Reproducibility of Data Analysis by LLMs
Cui, Jiaxin
Alexander, Rohan
Applications
We systematically evaluate the reproducibility of data analysis conducted by Large Language Models (LLMs). We evaluate two prompting strategies, six models, and four temperature settings, with ten independent executions per configuration, yielding 480 total attempts. We assess the completion, concordance, validity, and consistency of each attempt and find considerable variation in the analytical results even for consistent configurations. This suggests, as with human data analysis, the data analysis conducted by LLMs can vary, even given the same task, data, and settings. Our results mean that if an LLM is being used to conduct data analysis, then it should be run multiple times independently and the distribution of results considered.
title Same Prompt, Different Outcomes: Evaluating the Reproducibility of Data Analysis by LLMs
topic Applications
url https://arxiv.org/abs/2602.14349