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Jev

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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.

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  • 12 })
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    refunded:{

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    questions:{

  • Free
9

instructions:'Was a refund issued?',

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},

$ 45.00 10

},

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state:'The support agent issued a full refund to the customer.',

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  • 4

    model:'typesafe-ai/jev',

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    type:'boolean',

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    const result =awaitevaluate({

  • 09/15/2026
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import{ experimental_evaluate as evaluate }from'ai';