Native Tool Image Generation

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,           # Generation is slow; allow plenty of timeout (~60-90s per image)
)
data = resp.json()

# Pull the image tool result out of the output array
for item in data["output"]:
    if item.get("type") == "image_generation_call":
        raw = base64.b64decode(item["result"])   # result field is a base64 image
        with open("output.png", "wb") as f:
            f.write(raw)
        print("Saved output.png,", len(raw), "bytes")

{
  "id": "resp_...",
  "model": "gpt-5.5-2026-04-23",
  "status": "completed",
  "output": [
    {
      "type": "image_generation_call",   // <- key: the tool actually fired
      "result": "<a very long base64 PNG string>"  // <- the image itself, base64, png by default
    },
    { "type": "message", "content": [ /* may be empty; image responses don't always include text */ ] }
  ],
  "usage": { "input_tokens": 2347, "output_tokens": 74 }
}

{
  "model": "gpt-5.5",
  "input": "Generate a cartoon fox sticker",
  "tools": [{
    "type": "image_generation",
    "model": "gpt-image-2",
    "background": "transparent",
    "output_format": "png"
  }]
}