Jev breaks Vercel adoption records in two weeks

Jev, a decision model from TypeSafe AI launched on September 15, became the fastest-adopted AI model on Vercel's platform, reaching 35% of paid teams within two weeks — nearly double the reach of second-place Sonnet 5.5. Designed to choose between predetermined outputs, Jev runs cheaper and faster than alternatives, making it suited for large-scale data classification. Vercel itself adopted Jev to replace GPT-6 Luna for flagging harmful commands. Separately, Vercel's data shows open source models now account for over 70% of tokens processed, while spending on frontier labs has grown tenfold.