Jev becomes Vercel's fastest-adopted AI model, used by 35% of paid teams
TechCrunch reports that Vercel data shows Jev, the decision model from TypeSafe AI, was used by 35% of paid teams within two weeks of its limited September 15 release — nearly double the reach of the second most popular model, Sonnet 5.5 — which Vercel says is the fastest two-week adoption any model has seen. Jev is a lightweight tool that picks among a few predetermined outputs, making it cheaper and faster than alternatives and suited to classifying large volumes of data; Vercel itself adopted it to replace GPT-6 Luna for classifying harmful commands. The report cautions the figures come only from Vercel's AI gateway and may undercount major labs offering their own APIs, and notes open-weight models now account for over 70% of tokens processed there but about 25% of spend.
It offers rare hard usage data on whether hype around a new model translates into real adoption, and hints that lightweight decision models and open-weight options are becoming complementary to frontier labs.