Desde Portkey, tras la adquisición por Palo Alto Networks

import OpenAI from "openai";
import { PORTKEY_GATEWAY_URL } from "portkey-ai";

const client = new OpenAI({
  apiKey: process.env.PORTKEY_API_KEY,
  baseURL: PORTKEY_GATEWAY_URL,
  defaultHeaders: {
    "x-portkey-config": "pc-support-fallback",
    "x-portkey-metadata": JSON.stringify({ _user: "user_123" }),
  },
});

await client.chat.completions.create({
  model: "@openai-prod/gpt-5.6-terra",
  messages: [{ role: "user", content: "Hello" }],
});

import OpenAI from "openai";

const client = new OpenAI({
  apiKey: process.env.INFRO_API_KEY,
  baseURL: "https://api.infro.io/v1",
  defaultHeaders: { "X-INFRO-User-Id": "user_123" },
});

await client.chat.completions.create({
  // A route holding the config's targets and failure rules
  model: "support-fallback",
  messages: [{ role: "user", content: "Hello" }],
});