Analysing Prediction Stability of Non-Deterministic Prediction Models // Provides methods to analyse the stability of non- deterministic prediction models. Prediction stability is quantified either as data-based prediction stability (phi) or as model-based prediction stability (psi). The package implements measures for categorical, ordinal, and metric predictions based on repeated model fitting and corresponding predictions. Methods are based on Lange et al. (2025) doi:10.1186/s12859-025-06097-1.