Jev TypeSafe AI: Enterprise Security Guide

Jev, launched by TypeSafe AI in September 2026, is a text-only “System One” model designed to make fast, low-cost structured decisions rather than generate language, code, explanations, or tool actions. It returns typed Choice, Score, or Noul outputs with probabilities and confidence, making it suited to bounded tasks such as routing, screening, and rubric-based scoring; TypeSafe AI reports response times of 70–500 milliseconds and pricing of $0.042 per million input tokens. While its schema-constrained output reduces malformed responses and eliminates direct tool misuse, third-party testing cited in the guide found its accuracy below leading frontier models, and both vendor documentation and external reports indicate that prompt injection, misleading framing, authority claims, and option wording can significantly influence its verdicts. The guide therefore recommends treating Jev as a signal rather than an autonomous gate, with deterministic safeguards, human review for high-impact decisions, careful logging, version pinning, adversarial testing, and an AI gateway to redact sensitive data and enforce policies. TypeSafe AI states that it does not train on customer prompts and provides EU and UK transfer terms, but its published materials lack a fixed standard retention period, document U.S. hosting without regional options, and do not independently confirm certifications, making contractual due diligence necessary for enterprise deployment.

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