evaluate( )
Pattern
Jev Output Verifier
Write an answer, then show it only if Jev is at least 90% sure it actually answers the question. If not, rewrite once.
BeginnerSep 2026View the full pattern on desktop
Problems solved
- Gate a generated draft with one boolean probability
- Regenerate once when the draft misses the ship floor
- Keep the verify threshold in application code
Use cases
- Answer verification before showing a draft
- One-retry regeneration floors
- Teaching Jev boolean probabilities on generated text
AI SDK APIs
experimental_evaluategenerateTextgateway
Tags
jevevaluationtyped-decisionsbooleangenerate-textai-sdk
Requirements
- Node.js
- 24+
- Memory
- 256MB
- Other
- Vercel AI Gateway API key
Environment variables
AI_GATEWAY_API_KEYGet key
External services
vercel-ai-gatewayupstash
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