curl https://openrouter.ai/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -d '{
  "model": "openai/gpt-3.5-turbo",
  "messages": [
    {"role": "user", "content": "What is the meaning of life?"}
  ]
}'