Vercel data: Jev is fastest-adopted AI model ever

Vercel's AI gateway data shows Jev, a lightweight decision model from TypeSafe AI, was used by 35% of paid teams within two weeks of launch, nearly double the reach of second-place Sonnet 5.5 — the fastest two-week adoption Vercel has recorded. Released in limited form on September 15, Jev constrains outputs to run cheaper and faster for classification, prompting rival offerings from OpenAI and Amazon. Open source models now account for over 70% of tokens but under 25% of spend on the gateway.

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