Evidence for Daily and Weekly Periodic Variability in GPT-4o Performance

Data and analysis code related to the research study "Evidence for Daily and Weekly Periodic Variability in GPT-4o Performance". A preprint is available here: https://doi.org/10.48550/arXiv.2602.15889. To facilitate reproducibility, we additionally provide a Binder environment that launches a ready-to-use computational workspace, allowing all analyses to be executed directly in the browser without requiring local installation: https://mybinder.org/v2/gh/Pawelbure/Temporal-variability-GPT-4o_notebook_data/HEAD