TypeSafe Jev: How It Works, Examples & Pricing

How TypeSafe’s Jev helps your app

Jev is TypeSafe’s model for decisions inside software. Your app sends a message and a question, gets a structured answer, and uses it to route requests, flag urgent issues or categorize feedback.

Send a customer’s request to the right team without sorting it by hand.

Support chat

Customer

I was charged twice for this month. Can you refund the duplicate payment?

support-server Simulated logs

$ tail -f /var/log/support.log

Listening for incoming messages…

View API request and answer

API request`POST /v1/systemone`

{
  "model": "jev-1.13.0",
  "state": "I was charged twice for this month. Can you refund the duplicate payment?",
  "questions": {
    "department": {
      "type": "choice",
      "instructions": "Which team should handle this request?",
      "criteria": {
        "billing": "Payments, invoices and refunds",
        "technical": "Bugs, outages and integrations",
        "sales": "Plans, pricing and new accounts"
      }
    }
  }
}

Jev’s answer`answers`

{
  "department": {
    "type": "choice",
    "choice": "billing",
    "probabilities": {
      "billing": 0.94,
      "technical": 0.04,
      "sales": 0.02
    },
    "confidence": 0.91
  }
}

How it fits into your app

Send the context. The state can be a message, a JSON object or an array of text values.
Define the question. Choice picks from your options. Noul returns a yes/no probability. Score evaluates text against your ordered rubric.
Use the answer in code. Your app reads the structured result and decides whether to act, ask for clarification or send it for review.

TypeSafe API reference ↗

Published pricing and limits

Input tokens: $0.042 per million
Output tokens: Free
Total request context: 64,000 tokens: state and all questions
State + longest question: 32,000 tokens
Input format: Text only; no image, audio or video input

Checked Oct 8, 2026 against TypeSafe’s model documentation ↗.

Calculator coverage

ByeTokens does not yet calculate Jev workloads. The calculator’s chat assumptions do not capture a shared state, multiple typed questions or both context limits. Use measured input-token usage and the published rate to plan this part of your app.

View TypeSafe’s provider overview