Migrate from Anthropic SDK

import anthropic

client = anthropic.Anthropic(api_key=os.environ["ANTHROPIC_API_KEY"])

message = client.messages.create(
    model="claude-opus-4-5",
    max_tokens=1024,
    messages=[{"role": "user", "content": "explain closures in JavaScript"}]
)

print(message.content[0].text)

from openai import OpenAI

client = OpenAI(
    api_key=os.environ["ROUTOR_API_KEY"],
    base_url="https://api.routor.io/v1",
)

response = client.chat.completions.create(
    model="auto",
    max_tokens=1024,
    messages=[{"role": "user", "content": "explain closures in JavaScript"}]
)

print(response.choices[0].message.content)

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

const client = new Anthropic({ apiKey: process.env.ANTHROPIC_API_KEY });

const message = await client.messages.create({
  model:      "claude-opus-4-5",
  max_tokens: 1024,
  messages:   [{ role: "user", content: prompt }],
});

console.log(message.content[0].text);

import OpenAI from "openai";

const client = new OpenAI({
  apiKey:  process.env.ROUTOR_API_KEY,
  baseURL: "https://api.routor.io/v1",
});

const response = await client.chat.completions.create({
  model:      "auto",
  max_tokens: 1024,
  messages:   [{ role: "user", content: prompt }],
});

console.log(response.choices[0].message.content);

response = client.chat.completions.create(
    model="auto",
    messages=[...],
    extra_body={"routor_tier_floor": "STANDARD"}
)

response = client.chat.completions.create(
    model="auto",
    messages=[
        {"role": "system", "content": "You are a helpful assistant."},
        {"role": "user",   "content": prompt}
    ]
)