14 260% Annual Growth Over Fifteen Years of… Data to Train AI Models Led To… Note: Only “notable” language models shown (per Epoch AI, includes state of the art improvement on a recognized benchmark, >1K citations, historically relevant, with significant use). Source: Epoch AI (5/25) Training Dataset Size (Number of Words) for Key AI Models – 1950-2025, per Epoch AI Training Dataset Size – Number of Words +260% / Year AI Technology Compounding = Numbers Behind The Momentum