curl --request POST \
  --url https://api.example.com/openai/v1/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "<string>",
  "stream": true,
  "stream_options": {
    "include_usage": true
  }
}
'

{
  "choices": [
    {
      "finish_reason": "<string>",
      "index": 123,
      "delta": {
        "content": "<unknown>",
        "tool_call_id": "<string>",
        "tool_calls": [
          {
            "function": {
              "arguments": "<string>",
              "name": "<string>"
            },
            "type": "function",
            "id": "<string>"
          }
        ]
      },
      "message": {
        "content": "<unknown>",
        "tool_call_id": "<string>",
        "tool_calls": [
          {
            "function": {
              "arguments": "<string>",
              "name": "<string>"
            },
            "type": "function",
            "id": "<string>"
          }
        ]
      }
    }
  ],
  "created": 123,
  "model": "<string>",
  "object": "<string>",
  "$schema": "<string>",
  "usage": {
    "completion_tokens": 123,
    "prompt_tokens": 123,
    "total_tokens": 123
  }
}