Every AI model has a knowledge cutoff - but the official date rarely captures the whole story. The Hidden Gap Between Training and Knowing Model providers list a knowledge cutoff date, but that figure is deceptive in practice. According to research on model training practices, training data isn't sampled evenly across time, and content published close to the cutoff is underrepresented because the web hadn't fully indexed, discussed, and linked to it yet when the training crawl ra...