The data and the anecdata on Jev’s adoption are shocking. Everyone is adopting it. I think it’s a great product, but this is also downstream of the “AI is too expensive/slow” zeitgeist. People are eager to optimize and put AI in even more places! https://vercel.com/blog/ai-gateway-jev-model-launch…

Jev is the fastest-adopted model in AI Gateway history

Source: https://vercel.com/blog/ai-gateway-jev-model-launch Within 24 hours of launching on AI Gateway,Jev from TypeSafe AIreached more than twice as many paid teams as any previous model launch, making it the fastest-adopted model in gateway history.

Jev passed every other comparison model in its first twelve hours and continued to widen its lead for the rest of the day. By hour 24, it was being used by nearly 13% of paid teams. That’s 2x as many as the GPT-5.6 family and over 6x as many as Fable 5.1.

Jev reached a tenth of teams within 18 hours. Every other recent model launch remained below 7% after a full day. Jev’s launch shows how quickly a specialized model can find a place in production. Its first-day adoption was unmatched among recent launches; the next test is whether that early adoption lasts.

Copy link to headingAbout Jev

Jev was introduced on September 15 as a probabilistic decision model built for making structured decisions inside software. An application sends it context and a set of questions. Jev evaluates those questions in parallel and returns typed choices, scores, or true-or-false answers, along with probabilities.

Unlike the text produced by a general-purpose language model, Jev’s answers come in a format the code can use directly. Developers can use it to:

• choose an agent’s next tool or subagent
• decide whether a workflow should continue, retry, ask the user, or stop
• score urgency or risk before taking an action
• verify model outputs, enforce guardrails, or send uncertain cases for human review

In its own workflow evaluations, TypeSafe AI reports that Jev was up to 194 times faster and 445 times cheaper than language models.

See theSeptember AI Gateway Production Indexfor more model usage data ortry Jevthrough AI Gateway.

Vercel (@vercel): Jev was adopted faster than any other model in AI Gateway history.

In the first day, @typesafeai reached ~13% of teams, 2x the GPT-5.6 family and 6x Fable 5.1.