原生工具出圖

curl https://api.apiyi.com/v1/responses \
  -H "Authorization: Bearer $APIYI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gpt-5.5",
    "input": "Generate an image of a gray tabby cat hugging an otter with an orange scarf",
    "tools": [
      { "type": "image_generation" }
    ]
  }'

import base64, requests

resp = requests.post(
    "https://api.apiyi.com/v1/responses",
    headers={
        "Authorization": "Bearer $APIYI_KEY",
        "Content-Type": "application/json",
    },
    json={
        "model": "gpt-5.5",
        "input": "Generate an image of a gray tabby cat hugging an otter with an orange scarf",
        "tools": [{"type": "image_generation"}],
    },
    timeout=300,           # 出圖慢，務必給足超時（單張約 60~90s）
)
data = resp.json()

# 從 output 數組裡取出圖片工具的結果
for item in data["output"]:
    if item.get("type") == "image_generation_call":
        raw = base64.b64decode(item["result"])   # result 欄位是 base64 圖
        with open("output.png", "wb") as f:
            f.write(raw)
        print("已儲存 output.png,", len(raw), "bytes")

{
  "id": "resp_...",
  "model": "gpt-5.5-2026-04-23",
  "status": "completed",
  "output": [
    {
      "type": "image_generation_call",   // ← 關鍵：工具真的被觸發了
      "result": "<很長的 base64 PNG 串>"  // ← 圖片本體，base64，預設 png
    },
    { "type": "message", "content": [ /* 可能為空，出圖時不一定帶文字 */ ] }
  ],
  "usage": { "input_tokens": 2347, "output_tokens": 74 }
}