curl --request GET \
  --url https://{gatewayBaseURL}/batches/{id}/output \
  --header 'Authorization: Bearer <token>'

[
  {
    "id": "<string>",
    "custom_id": "<string>",
    "response": {
      "status_code": 123,
      "request_id": "<string>",
      "body": {
        "id": "<string>",
        "object": "<string>",
        "created": 123,
        "model": "<string>",
        "choices": [
          {
            "index": 123,
            "message": {
              "role": "<string>",
              "content": "<string>",
              "annotations": [
                "<unknown>"
              ],
              "refusal": "<unknown>"
            },
            "finish_reason": "<string>",
            "logprobs": "<unknown>"
          }
        ],
        "usage": {
          "prompt_tokens": 123,
          "completion_tokens": 123,
          "total_tokens": 123,
          "prompt_tokens_details": {
            "cached_tokens": 123,
            "audio_tokens": 123
          },
          "completion_tokens_details": {
            "reasoning_tokens": 123,
            "audio_tokens": 123,
            "accepted_prediction_tokens": 123,
            "rejected_prediction_tokens": 123
          }
        },
        "service_tier": "<string>",
        "system_fingerprint": "<unknown>"
      },
      "error": "<unknown>"
    },
    "error": "<unknown>"
  }
]