HappyHorse 1.1 — Text, Image & Reference to Video

HappyHorse 1.1 is Alibaba's unified video generation model, served through one endpoint on reAPI. A single model id (happyhorse-1-1) auto-routes text-to-video, image-to-video, and reference-to-video based on which inputs the request carries.

HappyHorse 1.1 pricing is per-second by resolution. See the current 720p and 1080p rates in the pricing table on this page. The routing mode never changes the rate, and failed jobs refund automatically.

HappyHorse 1.1 reads the mode from the request shape: a prompt with no media runs text-to-video, exactly one image in image_urls runs image-to-video (first frame), and one to nine images in reference_image_urls run reference-to-video. The prompt is required for text-to-video and reference-to-video, and optional for image-to-video.

HappyHorse 1.1 supports 720p and 1080p, nine aspect ratios for text-to-video and reference-to-video, and any integer duration from 3 to 15 seconds (default 5). In image-to-video, orientation is derived from the first-frame image, so aspect_ratio is ignored.

In HappyHorse 1.1 reference-to-video mode you can pass one to nine reference images and cite them in the prompt with bracket Image-N tags. HappyHorse 1.1 maps each tag to the matching image, so you control which reference drives subject, style, or background.

This release improves on 1.0 with better prompt understanding, smoother motion, stronger subject consistency, and higher overall quality. The request shape and resolution-by-second pricing model stay familiar, so upgrading is a one-line model id change.

The full parameter list, error codes, and runnable cURL examples live at /docs/happyhorse-1-1.

Paid. Completed generations are charged at the rates in this page's pricing table. Eligible new accounts may receive promotional test credits; availability and amount are shown at signup or in the dashboard. Technical or provider failures are refunded automatically, except where this page documents a charged output-moderation block.

No. Pricing is pay-as-you-go: $1 buys 1,000 credits and credits never expire. Cost scales with what you generate rather than with a recurring fee.

Sign up and create a key in the dashboard, no card required. Pass it as a Bearer token in the Authorization header.