Celeus is an AI-assisted statistical analysis platform designed for academic and scientific researchers. It suggests appropriate statistical methods for a given dataset and research question, then runs the analysis deterministically in R with pinned package versions to ensure reproducibility. An AI model interprets aggregate results in plain language and can draft Methods and Results text for papers, but never accesses raw data rows. Every analysis produces a downloadable reproducible package containing the R script, seed, session info, and audit log. Celeus supports 39 statistical methods across comparison, regression, survival, and diagnostic accuracy categories.