curl -L -X POST https://api.example/v1/chat/completions \
  -H 'Authorization: Bearer sk-example' -H 'Content-Type: application/json' \
  -d '{"model": "gpt-4o-example",
    "messages": [{"role": "system","content": "You are a helpful assistant."},
                {"role": "user","content": "Hi"}],
    "stream": false}'