Dissecting Non-Determinism in Large Language Models

The Large Language Models (LLMs) evolve into the backbone of complex decision-making systems, their inherent non-deterministic nature poses a significant threat to the validity of experimental results. This blog explores the impact of stochasticity, prompt brittleness, and LLM-as-a-Judge during both response generation and evaluation. We conclude that understanding these dynamics is essential to prevent misleading conclusions, advocating for consistency oriented practices that treat non-determinism as a critical variable in rigorous experimentation.