UlazAI - AI Image & Video Tools

New video model in UlazAI

HappyHorse-1.1 API and video generator

Create short AI videos from a prompt, one source image, up to 9 reference images, or an existing clip. HappyHorse-1.1 is built for 3-15 second shots in 720p or 1080p, with stronger prompt understanding, smoother motion and better identity consistency than the previous route.

Open HappyHorse in Video Studio Read video documentation
Duration
3-15s
Resolution
720p / 1080p
From
33 cr/s
Reference-to-video sample
Physics detail
Product polish
Scene realism

Prompt used

Use the reference person as the hero of a cinematic creator-studio promo: they step into soft window light, camera pushes in, subtle hand motion, polished UGC commercial look, no text, no logos.

Model video

Input, sample and route in one launch clip

Use this video as the quick model check: accepted input, generated output and the clearest route in Video Studio.

Input Choose text-to-video, image-to-video, reference-to-video, or video edit from your source material.

Sample Watch generated clips before spending credits.

Route Prompt, pricing, and next step sit together in one workflow.

Four routes for short AI video

Choose the route from the source material. Start from text, animate one still, preserve identity with references, or edit a clip you already have.

Text to Video

happyhorse_t2v

Range: 3-15s | 720p/1080p | 16:9, 9:16, 1:1 and more

Prompt only. Use this when the idea starts as a written scene with camera, action and light.

Open this route

Image to Video

happyhorse_i2v

Range: 3-15s | one image URL | 720p/1080p

Requires one source image up to 20MB. Best when a first frame, product shot or character still should stay recognizable.

Open this route

Reference to Video

happyhorse_r2v

Range: 3-15s | up to 9 reference images | broad aspect ratios

Use up to 9 reference images and labels such as [Image 1] when identity, style or composition consistency matters.

Open this route

Video Edit

happyhorse_videoedit

Range: source video URL | prompt-based edits

Requires a source video URL for targeted changes to motion, atmosphere or visual details.

Open this route

What changed in HappyHorse-1.1

The upgrade is strongest when a clip needs to keep a subject, product or style recognizable while the shot gains motion.

Sharper prompt understanding

Use prompts up to 5000 non-Chinese characters. The model handles camera notes, subject action, style and reference labels such as [Image 1] more directly.

Reference-to-video control

Reference-to-video supports up to 9 reference images, useful for character consistency, product shape, styling and campaign visuals.

Broad frame formats

Use 16:9, 9:16, 3:4, 4:3, 4:5, 5:4, 1:1, 9:21 or 21:9 with 720p or 1080p output.

3-15 second production range

Short enough for hooks and product shots, long enough for a mini story beat, creator promo or reference-led brand clip.

Input rules that affect output

  • Reference-to-video can use up to 9 JPEG, PNG, WEBP or JPG images, each up to 20MB; shortest side should be at least 400px.
  • Image-to-video uses one image URL up to 20MB, with width and height at least 300px and a usable aspect ratio between 1:2.5 and 2.5:1.
  • Text-to-video and reference-to-video support the full aspect ratio list; image-to-video follows the uploaded image shape.
  • Use 720p for exploration and 1080p when the shot is likely to become a final social or ad asset.

Clear per-second pricing

HappyHorse is billed linearly by duration and resolution, so you can estimate the cost of 3, 5, 10, or 15 second clips before generating.

720p: 33 credits per second

1080p: 44 credits per second

Duration 720p 1080p
3s 99 credits 132 credits
5s 165 credits 220 credits
10s 330 credits 440 credits
15s 495 credits 660 credits

Where HappyHorse is strongest

Character-consistent storytelling

Use reference images to keep a person, mascot or stylized character recognizable across short scenes.

Product demos and launch shots

Start from a product render or packshot and add camera movement, hand motion, physics detail or commercial lighting.

Brand and creator videos

Generate vertical hooks, UGC-style motion, campaign visuals and social cutaways with a clear source identity.

Video apps and API workflows

Expose text, image and reference routes separately so users can pick the exact workflow from their assets.

Production workflow

  1. 1. Write the scene with subject, camera movement, action, lighting and what should stay consistent.
  2. 2. Choose text-to-video, image-to-video, reference-to-video or video edit from the source material.
  3. 3. Use reference-to-video when identity, product shape or visual style must be preserved.
  4. 4. Select 720p or 1080p and a duration between 3 and 15 seconds.
  5. 5. Generate variants, compare motion and only refine the strongest shot.

Developer integration

Use the same Video Studio route for product interfaces and workflow automation. The model slug selects the HappyHorse route. 

POST /api/v1/video-studio/generate/

{
  "model_slug": "happyhorse_t2v",
  "prompt": "A miniature city built from cardboard comes alive at night",
  "duration": 5,
  "quality": "1080p",
  "aspect_ratio": "16:9"
}

GET /api/v1/video-studio/status/{job_id}/
Open HappyHorse docs Test in Video Studio

Frequently asked questions

Which HappyHorse routes does UlazAI support?

UlazAI supports text-to-video, image-to-video, reference-to-video and video edit through separate model slugs in Video Studio.

What is new in HappyHorse-1.1?

The upgrade improves prompt understanding, motion smoothness, visual quality and consistency across text, image and reference workflows.

How many reference images can I use?

Reference-to-video supports up to 9 reference images. Use labels such as [Image 1] in the prompt when a specific reference should guide a specific part of the shot.

What is the maximum length?

HappyHorse clips run from 3 to 15 seconds. For longer productions, create multiple shots or choose another video model with longer duration support.

Which aspect ratios are supported?

Text-to-video and reference-to-video support 16:9, 9:16, 3:4, 4:3, 4:5, 5:4, 1:1, 9:21 and 21:9.

Does the UlazAI route support audio?

The current HappyHorse routes in UlazAI focus on video output. Use models with native audio support when generated sound or spoken dialogue is required.

Start with HappyHorse-1.1 in UlazAI

Open Video Studio, choose the HappyHorse route, and create a short test video with predictable credits.

Open Video Studio Buy credits