OpenAI SDK

Keep the OpenAI SDK, change two fields

Override baseURL and apiKey. Model ids are owner/model strings across 209+ models.

Read the OpenAI SDK guide Unify API

The problem

What this is for

The official openai package looks vendor-locked. It is not — it only needs a compatible base URL.

What to do

Three steps, then copy

1.Keep openai installed.
2.Set baseURL to https://anyrouter.dev/api/v1 and apiKey to your sk-ar key.
3.Use model "anyrouter/free" or "anyrouter/auto" for the first call.

OpenAI SDK

import OpenAI from "openai"

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

const res = await client.chat.completions.create({
  model: "anyrouter/free",
  messages: [{ role: "user", content: "Say hello in one sentence." }],
})
console.log(res.choices[0]?.message.content)

Ready to try it

The guide has the full walkthrough. Sign up if you still need a key.

Read the OpenAI SDK guide Start free

One AI SDK provider for the whole catalog

Install @anyr/ai-sdk-provider. generateText and streamText take a catalog id — including anyrouter/free.

Open

One API in front of every provider dialect

OpenAI /chat/completions, Anthropic /messages, and a Responses API — same key, same catalog.

Open

AUTO

Start on anyrouter/free or anyrouter/auto

Two built-in virtual models: Go+ free failover (anyrouter/free) and stable paid failover (anyrouter/auto). Do not pick a flaky SKU for your first request.

Open