Jev on OpenRouter and Vercel AI Gateway

OpenRouter Jev and Vercel Jev are access paths, not a second model. You still send state + typed questions. You still get Choice / Score / Noul. The key and base URL change.

Use this page if you searched jev openrouter, openrouter jev, vercel jev, or vercel ai gateway.

Official path first

If you already have a TypeSafe key, call https://api.typesafe.ai/v1/systemone as in the API guide. Gateways are useful when:

• you are on the TypeSafe waitlist and already have an OpenRouter or Vercel account
• your team bills all models through one gateway
• you want gateway logging / budgets

OpenRouter

OpenRouter's TypeSafe SDK guide (accessed 2026-09-20):

• Point the official SDK at OpenRouter. The SDK appends /v1/systemone, so the URL becomes https://openrouter.ai/api/v1/systemone.
• Bare IDs map into OpenRouter's namespace: jev-latest → ~typesafe/jev-latest, jev-1.13 → typesafe/jev-1.13.
• OpenRouter also documents POST https://openrouter.ai/api/alpha/decisions with "model": "~typesafe/jev-latest".

curl https://openrouter.ai/api/v1/systemone \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "jev-latest",
    "state": "I was charged twice for my subscription.",
    "questions": {
      "refund": {
        "type": "noul",
        "instructions": "Is the customer asking for money back?"
      }
    }
  }'

OpenRouter's published response extras (id, provider, usage.cost) are gateway fields. Official TypeSafe responses are model, answers, usage.

Vercel AI Gateway

Vercel documents Jev as an evaluation model:

import { experimental_evaluate as evaluate } from "ai";

const result = await evaluate({
  model: "typesafe-ai/jev",
  state: "The support agent issued a full refund to the customer.",
  questions: {
    refunded: {
      type: "boolean",
      instructions: "Was a refund issued?",
    },
  },
});

Vercel's guide uses type: "boolean" in the AI SDK wrapper. The TypeSafe HTTP primitive remains Noul. Check which client you are in before you copy criteria fields.

Local Vercel OIDC tokens expire; Vercel's own guide says to re-run vercel env pull after a 401.

When to use a gateway

You already operate OpenRouter or Vercel and want Jev on the same bill.

When not to

You are debugging question wording. Use TypeSafe's official Playground / API so gateway mapping is not another variable.

Common mistakes

• Sending Jev a chat messages array because “OpenRouter is OpenAI-compatible”.
• Comparing gateway token counts to TypeSafe's usage without reading each vendor's definition.
• Assuming waitlist access is solved forever by a gateway. Availability and terms are the gateway's, then TypeSafe's.

Next: How to use Jev or Getting Started.