Ask a question. Get a decision you can inspect and govern.

The main question and each evidence check go out as one request against the same input. Read the tutorial.

import OpenAI from "openai"; // openai >= 7.30.0

const client = new OpenAI(); // reads OPENAI_API_KEY on the server

const decision = await client.decisions.create({
  model: "gpt-6-luna",
  input: "I was charged twice for my annual plan (order #48213). I only signed up once, 5 days ago. Please refund the duplicate charge.",
  questions: [
    {
      type: "predicate",
      name: "decision",
      instructions: "Should this refund request be approved under our 30-day refund policy?"
    },
    {
      type: "predicate",
      name: "factor_1",
      instructions: "The customer reports being charged more than once."
    },
    {
      type: "predicate",
      name: "factor_2",
      instructions: "The purchase was made within the 30-day refund window."
    },
    {
      type: "predicate",
      name: "factor_3",
      instructions: "The customer has received a previous refund."
    }
  ],
});

// Answers come back in question order. A question can also be refused.
const [main, ...checks] = decision.answers;
if (main.type === "refusal") throw new Error("The model declined to answer.");
if (main.type === "predicate") {
  console.log(main.probability); // 0–1 estimate that the condition is true
}