Measuring Aleatoric and Epistemic Uncertainty in LLMs: Empirical Evaluation on ID and OOD QA Tasks

arXiv — cs.CLThursday, November 6, 2025 at 5:00:00 AM

Measuring Aleatoric and Epistemic Uncertainty in LLMs: Empirical Evaluation on ID and OOD QA Tasks

A recent study has shed light on the importance of Uncertainty Estimation (UE) in Large Language Models (LLMs), which are becoming essential across various fields. This research evaluates different UE measures to assess both aleatoric and epistemic uncertainty, ensuring that LLM outputs are reliable. Understanding these uncertainties is crucial for enhancing the trustworthiness of AI applications, making this study a significant step forward in the development of more robust AI systems.
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