Vercel AI SDK

npm install ai @ai-sdk/openai
export ANYROUTER_API_KEY="sk-ar-your-key-here"

import { createOpenAI } from "@ai-sdk/openai"
import { generateText, streamText } from "ai"

const anyrouter = createOpenAI({
  baseURL: "https://anyrouter.dev/api/v1",
  apiKey: process.env.ANYROUTER_API_KEY,
})

const { text, response } = await generateText({
  model: anyrouter("anyrouter/free"),
  prompt: "Write a two-line poem about routers.",
})
console.log(response.modelId) // the model that served the request
console.log(text)

// Streaming
const result = streamText({
  model: anyrouter("anyrouter/free"),
  prompt: "Explain routing tables in two sentences.",
})
for await (const part of result.textStream) process.stdout.write(part)