Node.js

import Anthropic from "@anthropic-ai/sdk";

const client = new Anthropic({
  apiKey: "sk-mtm-...",
  baseURL: "https://vietrouter.com.vn",
});

const msg = await client.messages.create({
  model: "claude-fable-5",
  max_tokens: 1024,
  messages: [{ role: "user", content: "Hello!" }],
});
console.log(msg.content[0].text);