Statistical computation and diagnostics for ArviZ

arviz-stats is a Python package that provides statistical functions and diagnostics for the exploratory analysis of Bayesian models. It is a subpackage of the broader ArviZ library (along with arviz-base and arviz-plots) and focuses specifically on computational and numerical features like statistical summaries, diagnostics, and model comparison. The current version is 1.0.0, released on March 2, 2026. The ArviZ ecosystem, including arviz-stats, has a regular release cadence with several releases in the past year.