import requests
url = "https://openrouter.ai/api/v1/chat/completions"
headers = {
"Authorization": "Bearer YOUR_API_KEY",
"Content-Type": "application/json"
}
data = {
"model": "gpt-4.1",
"messages": [{"role": "user", "content": "Tell me a joke."}]
}
response = requests.post(url, headers=headers, json=data)
print(response.json())