Kev 4B

Jared Palmer's Kev 4B is an open-weight decision model on Qwen3.5-4B-Base under Apache 2.0, giving a probability for each answer instead of writing text. It takes yes/no, choice and rating questions about an English text or JSON document, for classification, routing and triage.

Price per 1M input tokens: $0.048input only, no output tokens
Context: 8.1K tokens

API

curl https://api.opencheap.si/v1/systemone \
  -H "Authorization: Bearer $OPENCHEAP_API_KEY" -H "Content-Type: application/json" \
  -d '{ "model": "opencheap/kev-4b", "state": "I was charged twice for my order and nobody answers my emails.",
        "questions": { "frustrated": { "type": "noul", "instructions": "Is the customer frustrated?" } } }'