Jev tutorial: 106x cheaper, 180ms yes/no gates replace PASS/FAIL string matching
max_paperclips · x · 2026-10-16
A hands-on tutorial on Jev (TypeSafe), a "System One" model that returns calibrated yes/no answers instead of text. Compared to prompting an LLM for PASS/FAIL and string-matching: 0 vs 6/10 errors on the examples, 180ms vs 2.1s per question, 106x cheaper, and confidence 0.9+ answers are 95% right. Includes working gate code for n8n/CI/agent runners, and clear limits: it only picks from given options, can't explain or reason step-by-step.
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