Hailuo 2.3 Fast Image to Video API

POST /v1/tasks

All models are called through the Unified Async API POST /v1/tasks endpoint; only the input fields differ (see input parameters below).

Model summary

Model name	hailuo-2.3-fast/image-to-video
Type	Video generation (image-to-video)
Endpoint	POST /v1/tasks
Pricing	See HiAPI Pricing

Hailuo 2.3 Fast image-to-video: the family price floor with 6s/10s per-video billing.

Production guidance

For production, pass callback.url at the top level of the request body so HiAPI can notify your service when the task reaches a terminal state.
GET /v1/tasks/:id is better for local debugging, low-volume jobs, or fallback reconciliation if a callback is missed.
Use callback.when=final. Both success and fail are terminal states, so your service should deduplicate by taskId.

Best suited for

Lowest price in the family

The price floor of the Hailuo family — ideal for batch animation.

duration

Fast turnaround

Quicker queue and generation for high-concurrency loads.

prompt

Request parameters

POST https://api.hiapi.ai/v1/tasks

# Create an async task — returns taskId immediately (generation runs async)
# Replace YOUR_API_KEY with your account API key
curl -X POST "https://api.hiapi.ai/v1/tasks" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "hailuo-2.3-fast/image-to-video",
  "input": {
    "prompt": "The crystal aurora fox turns its head and breathes out glowing mist, aurora light ripples across its fur, stars twinkle",
    "image_url": "https://static.hiapi.ai/gallery/2026/07/9aebd45f17988676.jpg",
    "duration": "6"
  }
}'

import requests, json

# Business params — fields vary by model (see the model page)
payload = json.loads(r'''
{
  "model": "hailuo-2.3-fast/image-to-video",
  "input": {
    "prompt": "The crystal aurora fox turns its head and breathes out glowing mist, aurora light ripples across its fur, stars twinkle",
    "image_url": "https://static.hiapi.ai/gallery/2026/07/9aebd45f17988676.jpg",
    "duration": "6"
  }
}
''')

# Create an async task — returns taskId immediately (generation runs async)
resp = requests.post(
    "https://api.hiapi.ai/v1/tasks",
    headers={"Authorization": "Bearer YOUR_API_KEY", "Content-Type": "application/json"},
    json=payload,
)
print(resp.json())  # Returns { code, message, data: { taskId } }

// Create an async task — returns taskId immediately (generation runs async)
// Replace YOUR_API_KEY with your account API key
const resp = await fetch("https://api.hiapi.ai/v1/tasks", {
  method: "POST",
  headers: {
    "Authorization": "Bearer YOUR_API_KEY",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
  "model": "hailuo-2.3-fast/image-to-video",
  "input": {
    "prompt": "The crystal aurora fox turns its head and breathes out glowing mist, aurora light ripples across its fur, stars twinkle",
    "image_url": "https://static.hiapi.ai/gallery/2026/07/9aebd45f17988676.jpg",
    "duration": "6"
  }
}),
});
console.log(await resp.json()); // Returns { code, message, data: { taskId } }

model string required

Fixed value hailuo-2.3-fast/image-to-video.

example hailuo-2.3-fast/image-to-video

input object required

Business parameters. Put Hailuo 2.3 Fast Image to Video-specific configuration here.

prompt string required

Text description of the video to generate.

image_url string required

First-frame image URL (single image); jpeg/png/webp, SVG not supported.

duration enum optional

Duration of the generated video in seconds.

default 6 enum: 610

prompt_optimizer boolean optional

Automatically optimize the prompt for better results.

default true

callback object optional

Optional callback configuration. When set, HiAPI notifies your service when the task reaches a terminal state.

url string required

Required when callback is set; HTTPS URL that receives terminal task notifications.

example https://your-domain.com/hiapi/callback

when enum optional

Callback trigger timing. Use final.

default final enum: final

Example requests

Aurora fox turns (6s)

Tested on the fast standard route.

Request body

{
  "model": "hailuo-2.3-fast/image-to-video",
  "input": {
    "prompt": "The crystal aurora fox turns its head and breathes out glowing mist, aurora light ripples across its fur, stars twinkle",
    "image_url": "https://static.hiapi.ai/gallery/2026/07/9aebd45f17988676.jpg",
    "duration": "6"
  }
}

Getting the result

The response returns a taskId immediately without waiting for generation to finish.
In production, prefer waiting for callback.url to receive the terminal notification. For local debugging, poll GET /v1/tasks/:id.
When status=success, download the generated video from output[].url.
When status=fail, fix the request based on the returned error instead of retrying the same invalid payload.

FAQ

Is there a text-to-video fast?

The fast family is image-to-video only upstream; use hailuo-2.3/text-to-video for t2v.