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TypeSafe AI

Jev

Jev is TypeSafe AI’s System One evaluation model for fast, structured decisions in software. It evaluates shared state against typed questions and returns choices, scores, and boolean probabilities, supporting classification, routing, rubric-based assessment, and automated verification. Multiple questions can be evaluated in parallel within a single request. Your use is subject to TypeSafe AI's Terms & Privacy Policies.

Price
Free
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import { experimental_evaluate as evaluate } from 'ai';


const result = await evaluate({
  model: 'typesafe-ai/jev',
  state: 'The support agent issued a full refund to the customer.',
  questions: {
    refunded: {
      type: 'boolean',
      instructions: 'Was a refund issued?',
    },
  },
})
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Promotional pricing ends on September 25, 2026.
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Provider
Context
Input
Output
ZDR
No Training
Free Tier
Release Date
TypeSafe AI
Free
Legal:Terms•Privacy
32K
Free
Free
09/15/2026