grok-4-fast-reasoning

import OpenAI from "openai";

const openai = new OpenAI({
  baseURL: "https://api.okrouter.com/v1",
  apiKey: "<YOUR_OKROUTER_KEY>",
});

async function main() {
  const completion = await openai.chat.completions.create({
    model: "grok-4-fast-reasoning",
    messages: [
      { role: "user", content: "Hello! What can you do?" }
    ],
  });

  console.log(completion.choices[0].message);
}

main();