Journal article
Did the Model Change, or Did Your Measurement? A Drift Claim Is a Test Against a Declared Null, the Careful Longitudinal Studies Mostly Caught Announced Version Moves, and a Capability Change Under a Pinned Identifier Is the Claim the Evidence Supports Least
(c) 2026 Pranay Mahendrakar. Licensed under CC BY 4.0. Two bodies of work describe the same deployed language models in opposite terms. One reports that models behind a fixed product name change over time and calls for continuous monitoring. The other reports that a single model, queried twice…