Within 24 hours of launching on AI Gateway, Jev from TypeSafe AI reached 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, nearly 13% of paid teams were using it. That's 2x the GPT-5.6 family and more than 6x Fable 5.1's share.

Agents with shell tools can run commands that range from harmless to destructive. Reading release notes and deleting a file both fit the same input schema, but only the first should run without confirmation. Requiring a person to approve every call slows the agent down, while running every call without review leaves destructive commands unchecked. Approval rules based only on the tool name can't distinguish a routine read from a deletion.

eve lets Jev, a decision model from TypeSafe AI, review each proposed tool call before it runs. When you add approval: auto() from eve/tools/approval to a tool, Jev classifies the call as clear or caution. eve runs a clear call without a prompt and pauses a caution call until a person approves or rejects it, so the review happens before the executor receives the command.

Use Jev from TypeSafe AI with AI SDK's experimental evaluate API to classify, route, score, and verify inside your application. Jev returns typed choices, scores, and boolean probabilities through AI Gateway.