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A decision model is a category of model that takes state (text, JSON, images) and a typed question and returns structured answers (probabilities, enumerated choices, ranking scores); it is named after TypeSafe's Jev and was released in September 2026.
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10/13/2026
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VerifiedJEV is a decision model launched by TypeSafe76% similarUnverifiedTypeSafe is a model platform oriented toward large-model decision-making, whose core idea is to constrain the LLM's free-text output into typed structured results; Jev is the decision model runtime on this platform.74% similarUnverifiedA typed decision model is a model that returns structured, typed results (such as choice, score, or probability) that software can consume directly without parsing free-form text.72% similarVerifiedJev is a type of front-end model called a 'System 1 model' — fast, cheap, and structured, designed specifically for decision-making; it does not generate text but instead returns probability scores within a predefined set of options.72% similarUnverifiedThese decision models are specifically designed to handle the request shape defined by Jev.71% similar
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