HappyHorse 1.1 Text to Video API

Alibaba Happy Horse 1.1 Text-to-Video

Alibaba Happy Horse 1.1 Text-to-Video turns natural-language prompts into cinematic videos with smooth motion, strong prompt alignment, and stable subject rendering. It supports both 720p and 1080p output, along with multiple aspect ratios for ad creatives, social content, storytelling, and concept work.

Need to animate a reference image instead? Try Alibaba Happy Horse 1.1 Image-to-Video.

Why Choose This?

Strong prompt fidelity
Follows detailed instructions for scene composition, action, lighting, mood, and camera movement.
Cinematic motion
Generates smooth, expressive motion with stable subjects and polished visual dynamics.
Flexible aspect ratios
Supports 16:9, 9:16, 1:1, 4:3, and 3:4 for landscape, portrait, and square video formats.
Resolution options for different needs
Choose 720p for lower-cost iteration or 1080p for higher-resolution outputs.
Production-ready API
Access the model through a REST inference API for easy integration into creative workflows.

Parameters

Parameter	Required	Description
prompt	Yes	Text prompt describing the desired video. Maximum `2500` characters.
aspect_ratio	No	Output aspect ratio: `16:9` default, `9:16`, `1:1`, `4:3`, or `3:4`.
resolution	No	Output resolution: `720p` default or `1080p`.
duration	No	Video length in seconds. Range: `3–15`, default `5`.
seed	No	Random seed for reproducibility. Range: `0–2147483647`.

How to Use

Write your prompt — Describe the scene, subject, action, camera movement, lighting, and mood.
Choose aspect ratio — Select the format that best matches your target platform or creative layout.
Choose resolution — Use 720p for lower-cost iteration or 1080p for higher-resolution output.
Set duration — Choose a clip length between 3 and 15 seconds.
Set a seed optional — Use a fixed seed if you want more reproducible results.
Submit — Generate and download your video.

Example Prompt

A cinematic street scene at night, light rain falling, soft reflections on wet pavement, a stylish woman walking slowly toward the camera, gentle dolly-in movement, neon glow, shallow depth of field, elegant and atmospheric mood.

Pricing

Per 5 Seconds

Resolution	Cost
720p	$0.70
1080p	$0.945

Per Second

Resolution	Cost
720p	$0.14
1080p	$0.189

Example Costs

Resolution	3s	5s	10s	15s
720p	$0.42	$0.70	$1.40	$2.10
1080p	$0.567	$0.945	$1.89	$2.835

Best Use Cases

Ad creatives — Generate short cinematic promo videos from detailed campaign concepts.
Social media content — Create vertical, square, or landscape videos for different platforms.
Concept visualization — Turn written ideas into motion previews for pitching, ideation, or storyboarding.
Brand storytelling — Build polished mood-driven clips with specific lighting, movement, and atmosphere.
Creative prototyping — Explore different visual directions before committing to full production.
Short-form cinematic scenes — Generate expressive clips for teasers, motion concepts, and narrative experiments.

Pro Tips

Be specific in your prompt about subject, action, camera movement, lighting, and mood.
Mention visual style clearly, such as cinematic, commercial, dreamy, realistic, or editorial.
Use 720p for rapid testing, then switch to 1080p for higher-resolution outputs.
Pick the aspect ratio based on the final destination: 9:16 for short-form mobile, 16:9 for widescreen, and 1:1 for square layouts.
Reuse the same seed when you want more reproducible outputs.
Start with shorter durations to validate motion and composition before generating longer clips.

Related Models

Alibaba Happy Horse 1.1 Image-to-Video — Animate a reference image into a cinematic video clip.

Happyhorse 1.1 Text To Video API — Quick start

Grab a WaveSpeedAI API key, then call POST https://api.wavespeed.ai/api/v3/alibaba/happyhorse-1.1/text-to-video with your input as JSON. The endpoint returns a prediction id. Start polling the result endpoint around every 2 seconds, increase the interval for long-running tasks, and stop on any terminal status. On completed, read URLs from data.outputs. Examples for Happyhorse 1.1 Text To Video below.

HTTP example

# Submit the prediction
curl --fail-with-body --connect-timeout 10 --max-time 60 \
  -X POST "https://api.wavespeed.ai/api/v3/alibaba/happyhorse-1.1/text-to-video" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY" \
  -d '{
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
}'

# Wait at least 2 seconds, then poll. Safe GET requests may be retried.
curl --fail-with-body --connect-timeout 10 --max-time 30 \
  --retry 4 --retry-all-errors --retry-delay 1 \
  -X GET "https://api.wavespeed.ai/api/v3/predictions/{request_id}/result" \
  -H "Authorization: Bearer $WAVESPEED_API_KEY"

# Start at 2 seconds and increase the interval for long-running tasks.
# Stop on completed, failed, cancelled, or timeout.

Node.js example

// npm install wavespeed
const { Client } = require('wavespeed');

const apiKey = process.env.WAVESPEED_API_KEY;
if (!apiKey) throw new Error('Set WAVESPEED_API_KEY');
const client = new Client(apiKey);

try {
  const result = await client.run("alibaba/happyhorse-1.1/text-to-video", {
        "prompt": "A cinematic shot of a city at sunset, soft golden light",
        "aspect_ratio": "16:9",
        "resolution": "720p",
        "duration": 5
}, {
    timeout: 3600,
    pollInterval: 2.0,
  });
  console.log(result.outputs);
} catch (error) {
  console.error('Generation failed:', error);
  process.exitCode = 1;
}

Python example

# pip install wavespeed
import os
from wavespeed import Client

client = Client(api_key=os.environ["WAVESPEED_API_KEY"])

try:
    output = client.run(
        "alibaba/happyhorse-1.1/text-to-video",
        {
    "prompt": "A cinematic shot of a city at sunset, soft golden light",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
},
        timeout=3600.0,
        poll_interval=2.0,
    )
    print(output["outputs"])
except Exception as error:
    raise SystemExit(f"Generation failed: {error}") from error

Happyhorse 1.1 Text To Video API — Frequently asked questions

What is the Happyhorse 1.1 Text To Video API?

Happyhorse 1.1 Text To Video is a Alibaba model for video generation, exposed as a REST API on WaveSpeedAI. Alibaba HappyHorse 1.1 Text-to-Video generates cinematic 720P or 1080P videos from text prompts, with smooth camera movement, expressive motion, and strong prompt fidelity. Ready-to-use REST inference API, best performance, no coldstarts, affordable pricing. You can call it programmatically or try it from the playground above.

How do I call the Happyhorse 1.1 Text To Video API?

POST your input parameters to the model's REST endpoint (shown in the API tab of this playground) with your WaveSpeedAI API key in the Authorization header. Submission returns a prediction ID. Poll the result endpoint starting around every 2 seconds, increase the interval for long-running tasks, and stop on any terminal status. The playground generates production-oriented Python, JavaScript, and cURL examples with timeouts, transient-error handling, and safe GET retries. Full request/response shape is documented at https://wavespeed.ai/docs/docs-api/alibaba/alibaba-happyhorse-1.1-text-to-video.

How much does Happyhorse 1.1 Text To Video cost per run?

Happyhorse 1.1 Text To Video starts at $0.70 per run. That figure is the base price — the final charge scales with the parameters you set in the form (output size, length, count, references, or whatever knobs this model exposes), so a higher-quality or larger output costs more than a minimal one. The exact cost for your current input is shown live next to the Generate button before you submit, and the actual per-call charge is recorded on the prediction afterwards.

What inputs does Happyhorse 1.1 Text To Video accept?

Key inputs: `prompt`, `aspect_ratio`, `resolution`, `duration`, `seed`. The full JSON schema (types, defaults, allowed values) is rendered above the Generate button and mirrored in the API reference at https://wavespeed.ai/docs/docs-api/alibaba/alibaba-happyhorse-1.1-text-to-video.

How do I get started with the Happyhorse 1.1 Text To Video API?

Sign up for a free WaveSpeedAI account to claim starter credits, copy your API key from /accesskey, then call the endpoint shown in the API tab of the playground. The playground also auto-generates a code sample in Python, JavaScript, or cURL for the parameters you've set.

Can I use Happyhorse 1.1 Text To Video outputs commercially?

Commercial usage rights depend on the model's license, set by its provider (Alibaba). The license summary appears on the model card above; see WaveSpeedAI's Terms of Service for platform-level conditions.

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