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HappyHorse 1.1 — The #1 Open-Source AI Video Model, Live on Viberot
HappyHorse 1.1 is a unified Transformer that produces cinematic 1080p video from a text prompt, a single image, or up to nine reference images. It topped the Artificial Analysis AI Video Arena, surpassing Seedance 2.0 — and you can generate with it on Viberot right now.
What Makes HappyHorse 1.1 Special
Open-source quality at 1080p
HappyHorse 1.1 replaces multi-stream complexity with a single self-attention Transformer. The result is stable motion, strong prompt adherence, and three distinct ways to drive a shot — text, a single image, or a set of reference images.
How to Use HappyHorse 1.1 on Viberot
From prompt to finished video
HappyHorse 1.1 runs on the same workflow as every other model on Viberot — select the model, write a prompt, pick a duration, and generate.
Select HappyHorse 1.1
Pick HappyHorse 1.1 from the Viberot video model selector. No setup, no GPU, no install.
Write Your Prompt
Describe the scene, subject, camera movement and mood. HappyHorse 1.1 accepts prompts up to roughly 5,000 characters.
Choose Your Input Mode
Go text-to-video, upload one image to animate it, or supply up to nine reference images to lock characters and style. Then pick 720p or 1080p and a duration from 3 to 15 seconds.
Generate & Download
Hit Generate and Viberot streams the finished video straight to your library, watermark-free on paid plans.
HappyHorse 1.1 on Viberot — Open-Source Quality, Studio Workflow
Why use it here instead of self-hosting
HappyHorse 1.1 is open-source, but running it well requires serious GPUs. Viberot hosts it for you with zero setup and the same credit balance you already use for Veo, Seedance and Kling.
- No GPUs, no installs — use HappyHorse 1.1 straight from the browser
- Unified credits across every AI video model on Viberot
- Commercial-use license preserved for paid-plan output
- Per-second pricing — a 4-second clip costs less than a 15-second one
HappyHorse 1.1 vs Other AI Video Models
How it compares
HappyHorse is the first open-source model to rank #1 on the public AI Video Arena. Here is how it stacks up against the current Viberot lineup.
#1 on AI Video Arena
Blind-test Elo score above Seedance 2.0 and Veo 3.1 Fast at the time of this page.
Fully Open Source
Base model, distilled model, super-resolution module and inference code are released with commercial rights.
Nine Reference Images
More reference slots than most models here — useful for keeping a character consistent across a series of shots.
Continuous Duration
Any length from 3 to 15 seconds, billed per second, instead of fixed 5s / 10s tiers.
Single-Stream Transformer
A self-attention-only architecture — simpler, faster to iterate on, easier to fine-tune.
Commercial Use
Output on paid Viberot plans is watermark-free and safe for commercial projects.
HappyHorse 1.1 FAQ
Common questions
Generate with HappyHorse 1.1 on Viberot
HappyHorse 1.1 is the #1 open-source AI video model, and it is live on Viberot today. Create a free account and generate your first 1080p clip in under a minute.