HappyHorse 1.0 API
HappyHorse 1.0 is Alibaba ATH-AI's unified multimodal video model, available on APIMart as the HappyHorse API. It generates 1080p video with synchronized native audio in a single forward pass, supports 7-language lip-sync, and ranks #1 on Artificial Analysis text-to-video and image-to-video leaderboards. Also written as Happy Horse, so the Happy Horse API and the HappyHorse API are the same service. On this page, HappyHorse 1.0 supports text-to-video, first-frame and reference-image generation, and source-video editing.
Service Highlights
- Official Discounts
- Pay-as-you-go
- Fast & Low Latency
Video link valid for 72 hours
HappyHorse 1.0 API Pricing
Transparent pricing with no hidden fees. Pay only for what you use.
| Variant | Tier | GoldCurrent price | Platinum | Diamond | Official | Your savings |
|---|---|---|---|---|---|---|
happyhorse-1.0 | 720P | 1.3Credits(~$0.13)/sec | 1.235Credits(~$0.1235)/sec | 1.17Credits(~$0.117)/sec | 1.625Credits(~$0.1625)/sec | 20% |
| 720P · EDIT | 1.3Credits(~$0.13)/sec | 1.235Credits(~$0.1235)/sec | 1.17Credits(~$0.117)/sec | 1.625Credits(~$0.1625)/sec | 20% | |
| 1080P | 2.3Credits(~$0.23)/sec | 2.185Credits(~$0.2185)/sec | 2.07Credits(~$0.207)/sec | 2.875Credits(~$0.2875)/sec | 20% | |
| 1080P · EDIT | 2.3Credits(~$0.23)/sec | 2.185Credits(~$0.2185)/sec | 2.07Credits(~$0.207)/sec | 2.875Credits(~$0.2875)/sec | 20% |
* Actual costs are subject to final output.
The HappyHorse API — Native Audio Video Model on APIMart
Alibaba's HappyHorse unifies pixels and audio in a single Transformer, delivering 1080p videos with sub-pixel lip-sync across 7 languages. APIMart provides unified access to the HappyHorse API with a single key.
50K+
Active Users
99.9%
Uptime
2x
Faster
—
Cost Savings
Why the HappyHorse API Stands Out
HappyHorse is the first generative video model to natively co-produce visuals and audio
Unified Multimodal Transformer
Native Audio Generation
7-Language Lip-Sync
On Artificial Analysis
8-Step DMD-2 Sampling
Native 1080p Output
Optimized for Vertical & Dialogue
Sandwich Architecture
Where the HappyHorse API Shines
Production scenarios that benefit from native audio-video co-generation
Multilingual Ad Creatives
Vertical Short Video at Scale
Talking-Head & Spokesperson Video
Storyboard & Pre-Visualization
Localized E-Learning
Cross-Border Brand Content
Get Started with the HappyHorse API
Start creating native-audio AI videos with the HappyHorse API in just a few simple steps
Sign Up
Create your free APIMart account to get started with the HappyHorse API. You can set up an organization for your team at any time.
Top Up
Add funds to your account balance to start using the service. Your balance can be used across all models on APIMart, including the HappyHorse API.
Generate API Key
Create an API key in the dashboard — you'll need it to authenticate every call to the HappyHorse API. Get instant access to native-audio AI video.
User Reviews for the HappyHorse API
Real feedback from creators and developers worldwide. These reviews describe the original HappyHorse 1.0 experience.
“The HappyHorse API audio output is unreal — dialogue lip-sync just works on the first generation, no separate TTS pipeline.”
Alex Morgan
Creative Director
“HappyHorse cut our localization time by 70%. One prompt, seven languages, all with matching mouth shapes.”
Sarah Kim
Marketing Manager
“1080p straight out of HappyHorse with no upscaling artifacts. The temporal consistency across multi-shot sequences is impressive.”
James Wilson
Full-Stack Developer
“We swapped our previous video provider for HappyHorse and saw immediate quality wins on dialogue-heavy scenes.”
Lisa Chen
CTO, StartupAI
“As an indie filmmaker, HappyHorse has been a game-changer for storyboard pre-visualization with temp dialogue baked in.”
Marco Rivera
Independent Filmmaker
“Routing the HappyHorse API through APIMart's unified gateway means I keep one key for everything. Integration took less than an hour.”
Emily Zhang
DevOps Engineer
The HappyHorse API — Frequently Asked Questions
Everything you need to know about the HappyHorse API on APIMart
What is the HappyHorse API?
The HappyHorse API is a generative video service from Alibaba's ATH-AI division (originating from Taobao & Tmall's Future Lifestyle Lab). It exposes a single-stream multimodal Transformer that generates 1080p video and synchronized native audio in one forward pass.
Is the Happy Horse API the same as the HappyHorse API?
Yes. Happy Horse and HappyHorse are two spellings of the same Alibaba video model. On APIMart, the Happy Horse API covers HappyHorse 1.0 (happyhorse-1.0) and HappyHorse 1.1 (happyhorse-1.1); both are called with one APIMart API key and billed per second of generated video at the prices shown on this page.
What parameters does the HappyHorse API accept?
The HappyHorse API accepts these core parameters: model (happyhorse-1.0), prompt (text description, ≤2500 chars), resolution (720P or 1080P, default 1080P), duration (clip length 3–15s, default 5s), size (16:9 / 9:16 / 1:1 / 4:3 / 3:4, for text-to-video and reference-image generation), plus optional seed and watermark. Pass first_frame_image for image-to-video, where the first frame determines the aspect ratio, or image_urls with 1–9 images for reference-image generation. For EDIT, pass video_url and optionally up to 5 reference images and audio_setting (auto or origin). Output follows the source video, capped at 15 seconds; duration is ignored.
How is HappyHorse API audio different from other video models?
Most video models generate visuals first, then add audio in a separate step. HappyHorse generates visuals and audio jointly in the same Transformer — yielding sub-pixel lip-sync, naturally aligned ambient sound, and far more believable dialogue scenes.
Which languages does HappyHorse API lip-sync support?
The HappyHorse API supports seven languages: English, Mandarin Chinese, Cantonese, Japanese, Korean, German, and French. Mouth shapes align at sub-pixel precision based on the chosen audio language.
How fast is the HappyHorse API?
On a single NVIDIA H100 GPU, HappyHorse generates a native 1080p clip in roughly 38 seconds. The 8-step DMD-2 sampler skips classifier-free guidance, making it dramatically faster than diffusion video models that require 30+ steps.
How does HappyHorse compare to Sora 2, Veo 3.1, and Kling?
On Artificial Analysis blind evaluations, HappyHorse ranks #1 on both text-to-video (1333 Elo) and image-to-video (1392 Elo). Its key differentiator vs. Sora 2 and Veo 3.1 is native audio co-generation; vs. Kling, it offers stronger dialogue and lip-sync.
What is the difference between HappyHorse 1.0 and HappyHorse 1.1?
The two models can be called with the same API key. happyhorse-1.0 supports text-to-video, first-frame image-to-video, reference images, and video editing with a source video and audio settings. happyhorse-1.1 covers text-to-video, image-to-video, and reference images but does not support video editing. This page shows the per-second prices for HappyHorse 1.0.
What is the pricing for the HappyHorse API?
Check the pricing section on this page for current per-second rates. Top up credits on APIMart to start generating videos with the HappyHorse API. For video editing, use the EDIT rate for the selected resolution and the source-video duration, capped at 15 seconds.
How do I get started with the HappyHorse API?
Send a POST request to /v1/videos/generations with your APIMart API key, model name happyhorse-1.0, and your prompt. See the HappyHorse API documentation for full integration examples.
How do I get a HappyHorse API key?
Sign up for APIMart, open the API Keys page in your dashboard and create a key. The same key calls the HappyHorse API (happyhorse-1.0 and happyhorse-1.1) and every other model on the platform, with pay-as-you-go billing and no subscription.
Is there a discount on the HappyHorse API?
Yes. The HappyHorse API is billed per second of generated video. The pricing table on this page lists every specification and shows the Gold member price, 20% off. Platinum and Diamond members save even more, up to 28%. You only pay for successful requests.
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