Runway Gen 4.5

# Submit an async task; returns a taskId immediately (no waiting for generation)
curl -X POST "https://api.hiapi.ai/v1/tasks" \
  -H "Authorization: Bearer $HIAPI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "runway-gen-4.5/image-to-video",
  "input": {
    "prompt": "…",
    "duration": 5,
    "image_urls": "…",
    "aspect_ratio": "16:9"
  }
}'

const res = await fetch("https://api.hiapi.ai/v1/tasks", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.HIAPI_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "runway-gen-4.5/image-to-video",
    input: {
      "prompt": "…",
      "duration": 5,
      "image_urls": "…",
      "aspect_ratio": "16:9"
    }
  }),
});
const task = await res.json();
// { code: 200, message: "success", data: { taskId } }

import os, requests

res = requests.post(
    "https://api.hiapi.ai/v1/tasks",
    headers={"Authorization": f"Bearer {os.environ['HIAPI_API_KEY']}"},
    json={
        "model": "runway-gen-4.5/image-to-video",
        "input": {
          "prompt": "…",
          "duration": 5,
          "image_urls": "…",
          "aspect_ratio": "16:9"
        }
    },
)
print(res.json())  # { code, message, data: { taskId } }