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Kev 4B

Kev 4B is a small open-weight decision model — a LoRA adapter and pointer head on Qwen3.5-4B-Base. It answers typed questions about a state with calibrated probabilities instead of generated text, on the same native `/v1/decisions` contract as the rest of the family.

jaredpalmer/kev-4b joins the Decisions family. It is a LoRA adapter plus a pointer head on Qwen3.5-4B-Base — about 4B parameters, Apache-2.0, and the recommended checkpoint in the Kev family (0.8B / 4B / 9B). Send state and typed questions (noul / choice / score) to POST /api/v1/decisions; you get one calibrated probability per question in a single forward pass, and no generated text at all. Reach for it on routing, ranking, triage, and verification decisions rather than chat.

curl -fsSL https://anyrouter.dev/setup.sh | bash
anyr login
anyr decision --model jaredpalmer/kev-4b
Run a Decisions model with the native anyr command.

The same contract from TypeScript or curl — one request, three typed questions:

const res = await fetch("https://anyrouter.dev/api/v1/decisions", {
  method: "POST",
  headers: {
    Authorization: "Bearer " + process.env.ANYROUTER_API_KEY,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    state: "My checkout page shows a blank screen after I click Pay.",
    model: "jaredpalmer/kev-4b",
    questions: {
      is_bug: { type: "noul", instructions: "Is the customer reporting a defect?" },
      team: {
        type: "choice",
        instructions: "Which team should own this ticket?",
        criteria: {
          account: "Login, permissions, or profile issues.",
          frontend: "Rendering, layout, or browser compatibility issues.",
          payments: "Checkout, billing, or payment processing issues.",
        },
      },
      urgency: {
        type: "score",
        instructions: "How urgent is this ticket?",
        criteria: ["Can wait for the next release", "This week", "Blocking revenue"],
      },
    },
  }),
})

console.log(await res.json())
noul, choice, and score in one pass.

8K context, $0.042 per 1M input tokens and $0 output — the same rate as the rest of the decision-model family. Both routes are BYOK plus the community pool, so bring a key from SiliconFlow or OpenRouter under Dashboard → BYOK, or let a donated pool key serve the call.

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