Structured JSON

import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.inquantum.ai/v1",
  apiKey: process.env.PLANCK_API_KEY,
});

const response = await client.chat.completions.create({
  model: "gpt-4.1-mini",
  messages: [
    {
      role: "user",
      content: "The customer cannot sign in after rotating their API key.",
    },
  ],
  response_format: {
    type: "json_schema",
    json_schema: {
      name: "support_ticket",
      strict: true,
      schema: {
        type: "object",
        properties: {
          category: {
            type: "string",
            enum: ["account", "billing", "technical"],
          },
          priority: {
            type: "string",
            enum: ["low", "medium", "high"],
          },
          summary: { type: "string" },
        },
        required: ["category", "priority", "summary"],
        additionalProperties: false,
      },
    },
  },
});

const ticket = JSON.parse(response.choices[0].message.content ?? "{}");
console.log(ticket);

{
  "category": "account",
  "priority": "high",
  "summary": "Customer cannot sign in after rotating an API key."
}