官Key直连，智能路由，成熟稳定，永不蕉绿

curl -X POST "https://api.omnihub.com/v1beta/models/gemini-2.5-flash-image:generateContent" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [
      {
        "parts": [
          { "text": "Generate a futuristic cyberpunk city at night with cinematic lighting and ultra-high detail." }
        ]
      }
    ],
    "generationConfig": {
      "responseModalities": ["IMAGE"],
      "imageConfig": {
        "aspectRatio": "16:9"
      }
    }
  }'