curl -X POST "https://model-api.skyengine.com.cn/v1/chat/completions" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <API-KEY>" \
  -d '{
    "model": "gpt-5-2025-08-07",
    "messages": [
      {
        "role": "user",
        "content": [
          {
            "type": "text",
            "text": "这张图片里有什么？"
          },
          {
            "type": "image_url",
            "image_url": {
              "url": "https://example.com/image.jpg"
            }
          }
        ]
      }
    ],
    "max_tokens": 1000
  }'