Happy Horse 1.1 Reference to Video generates video conditioned on 1-9 reference images plus a text prompt, with selectable 720p/1080p output resolution.
Happy Horse 1.1 Reference to Video — generate video conditioned on 1-9 reference images plus a text prompt. Selectable output resolution (720p/1080p) — price scales with the resolution chosen.
About this model
Happy Horse 1.1 Reference to Video generates video conditioned on 1-9 reference images plus a text prompt, at your choice of 720p or 1080p output resolution, with improved reliability over Happy Horse 1.0 via an automatic fallback provider path. Reference multiple images in your prompt to compose scenes combining characters, objects, and settings from separate source images.
A single resolution parameter lets you draft cheaply at 720p and switch to 1080p for final output on the same endpoint.
Cost analysis
| Provider | Cost | Notes |
|---|---|---|
| muapiapp | $0.14–$0.18/sec (720p–1080p) | Simple per-second, resolution-scaled pricing with no subscriptions. Pick 720p for cost-effective drafts or 1080p for premium output, on the same endpoint. |
Simple per-second, resolution-scaled pricing with no subscriptions. Pick 720p for cost-effective drafts or 1080p for premium output, on the same endpoint.
** Competitor pricing is estimated based on similar model architectures and usage tiers.
Configuration schema
| Parameter | Type | Description | Default |
|---|---|---|---|
| prompt | string | Text description of the desired video. Up to 5,000 characters. | Place @image1 inside @image2 running across countertops while giant cooking disasters happen everywhere. Exploding soup pots, flying vegetables, and fire bursts create chaos. |
| Resolutie | Enum (2 options) | Output resolution. Price scales with resolution: 720p is cheaper, 1080p is more expensive. | 720p |
| Referentie afbeeldingen | array | 1-9 afbeeldings-URL. JPEG/PNG/WEBP, >=400px, <=10 MB. | https://d3adwkbyhxyrtq.cloudfront.net/webassets/videomodels/happy-horse-1-reference-to-video-1080p-1.jpg |
| aspectverhouding | Enum (5 options) | uitvoer video-beeldverhouding. | 16:9 |
| Duur (seconden) | int | videoduur () . | 5 |
| Zaad | int | zaad, (0-2147483647) . | 0 |
Text description of the desired video. Up to 5,000 characters.
Place @image1 inside @image2 running across countertops while giant cooking disasters happen everywhere. Exploding soup pots, flying vegetables, and fire bursts create chaos.Output resolution. Price scales with resolution: 720p is cheaper, 1080p is more expensive.
720p1-9 afbeeldings-URL. JPEG/PNG/WEBP, >=400px, <=10 MB.
https://d3adwkbyhxyrtq.cloudfront.net/webassets/videomodels/happy-horse-1-reference-to-video-1080p-1.jpguitvoer video-beeldverhouding.
16:9videoduur () .
5zaad, (0-2147483647) .
0Developer documentation
images_list (JPEG/PNG/WEBP, ≥400px shortest side, ≤10MB each).resolution to "720p" (cheaper, default) or "1080p" (premium output).Frequently asked
Happy Horse 1.1 Reference to Video costs $0.14/sec at 720p (default) or $0.18/sec at 1080p on muapi. A 5-second 720p clip costs $0.70; the same clip at 1080p costs $0.90.
1.1 is a newer generation with improved reliability (automatic fallback provider) and lower per-second pricing at both resolutions.
Pass `resolution: "720p"` (default) or `resolution: "1080p"` in your request body — both are served by the same endpoint.
1 to 9 images, referenced in your prompt matching the order in `images_list`.
They still work exactly as before, unchanged, for existing integrations. This unified endpoint is the new recommended way to access both resolutions through one integration.