APIMART Growth evidence. Live sources were checked on 2026-09-02. CTA links are attributed to this exact GitHub guide.

happyhorse-1.0 API Limits, Inputs and Production Checks on APIMART

The public APIMART description states: The HappyHorse API by Alibaba on APIMart delivers 1080p AI video with native audio and 7-language lip-sync, ranked #1 on Artificial Analysis.

Source-backed production checks

• 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.
• 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), aspect_ratio (16:9 / 9:16 / 1:1 / 4:3 / 3:4, text-to-video only), plus optional seed and watermark. Pass image_urls or first_frame_image to switch into image-to-video mode (aspect_ratio is then derived from the first frame).
• How is HappyHorse 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.

Validate every request field against the linked API reference. Persist task identifiers for asynchronous routes, use bounded polling and backoff, and do not count submission as completed output.

FAQ

What public evidence was checked for happyhorse-1.0?

The live APIMART model page and its linked API reference were checked on September 2, 2026.

Where are accepted inputs and options defined?

Use the linked API reference as the source of truth for request fields, enumerations and incompatible combinations.

How should asynchronous work be measured?

Persist the returned task identifier and count success only after the final task status reports a completed output.

Which failures need separate handling?

Treat validation, authentication, balance, rate-limit and server failures as distinct operational states.

Can public constraints change?

Yes. Recheck the live model page and API reference before shipping or changing a production preset.

Try happyhorse-1.0 on APIMART

• Open the attributed happyhorse-1.0 model page
• Review current APIMART pricing

Sources and disclosure

• APIMART model page
• APIMART API reference
• APIMART Terms of Service

APIMART operates the gateway. Live prices, limits and provider terms can change.

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