Models/Alibaba/HappyHorse 1.0

BetaAlibaba open-source video model8 variants

HappyHorse 1.0 API — #1-Ranked Alibaba AI Video Model

HappyHorse 1.0 is Alibaba's open-source AI video model for expressive, stylized generation and editing. It combines native 1080p output, vivid character motion, reference-conditioned scenes, and natural-language video edits across eight Muapi variants.

Get a Muapi API Key Preview HappyHorse 1.0

Closed playground beta

HappyHorse 1.0 is currently available inside the Muapi Playground on the Pro and Business plans. API-key access will open in a later public release.

Key Capabilities

HappyHorse 1.0 is Alibaba's open-source AI video model for expressive, stylized video generation. It translates text prompts, still images, and visual references into scenes with vivid character motion and dynamic storytelling.

Expressive Text-to-Video

Describe a scene, action, or narrative and generate a stylized clip with fluid character motion and coherent visual storytelling.

Image-to-Video Animation

Bring a still image to life with optional motion direction, camera movement, and mood guidance.

Reference-Conditioned Scenes

Use one to nine reference images to anchor a character, product, or visual style across generated shots.

Natural-Language Video Edit

Modify wardrobe, props, environments, or character details in an existing video while preserving source motion.

720p and Native 1080p

Use 720p for fast, cost-efficient iteration and 1080p when the final delivery needs higher resolution.

One Model Family

Keep the same Muapi authentication and asynchronous request lifecycle while switching between generation and editing modes.

Why teams use HappyHorse 1.0

HappyHorse 1.0 is positioned as a leading open-source video model for text-to-video and image-to-video generation. Its combination of expressive motion, broad visual styles, native 1080p output, and fast iteration makes it useful for storyboards, social content, product animation, and game or film concept work.

A consistent video API

All eight HappyHorse 1.0 variants use Muapi's shared API-key authentication, asynchronous task lifecycle, and prediction result endpoint. Start in the Playground to test prompts, then move the same payload shape into your application when API access is enabled for your plan. For background and release context, read the HappyHorse 1.1 API guide.

HappyHorse 1.0 Variant Comparison

Variant	Mode	Output	Input	Price
happy-horse-1-text-to-video-1080p	Text to Video	1080p	prompt	$0.36/sec
happy-horse-1-text-to-video-720p	Text to Video	720p	prompt	$0.18/sec
happy-horse-1-image-to-video-1080p	Image to Video	1080p	images_list + optional prompt	$0.36/sec
happy-horse-1-image-to-video-720p	Image to Video	720p	images_list + prompt	$0.18/sec
happy-horse-1-reference-to-video-1080p	Reference to Video	1080p	1–9 images + prompt	$0.42/sec
happy-horse-1-reference-to-video-720p	Reference to Video	720p	1–9 images + prompt	$0.21/sec
happy-horse-1-video-edit-1080p	Video Edit	1080p	video_url + prompt	$0.42/sec
happy-horse-1-video-edit-720p	Video Edit	720p	video_url + prompt	$0.21/sec

The Playground beta currently gates access by plan. Per-second prices above reflect the current Muapi model pricing; verify the live schema and plan availability before production use.

Built for fast visual iteration

Animated Storytelling

Create short narrative shots, storyboard sequences, and character moments from written scene descriptions.

Product and Brand Video

Animate product stills or reference images into on-brand clips for campaigns, ecommerce, and social media.

Game and Film Concepts

Turn concept art, moodboards, and visual references into moving pitch material and world-building tests.

Video Retouching

Use natural-language edits to test wardrobe, props, weather, lighting, and environment changes without rebuilding footage.

How to Call the HappyHorse 1.0 API

Choose a variant, submit its schema-defined JSON payload with your Muapi API key, save the request ID, and poll the standard result endpoint. Use public image or video URLs for media inputs.

Text-to-video

curl -X POST https://api.muapi.ai/api/v1/happy-horse-1-text-to-video-1080p \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"A playful fox runs through a sunlit meadow","aspect_ratio":"16:9","duration":5}'

# Response: {"request_id":"REQUEST_ID"}

Send a prompt, aspect ratio, and duration to the 720p or 1080p text-to-video endpoint.

Image-to-video

curl -X POST https://api.muapi.ai/api/v1/happy-horse-1-image-to-video-1080p \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"A gentle breeze moves the grass","images_list":["https://example.com/reference.jpg"],"aspect_ratio":"16:9","duration":5}'

# Response: {"request_id":"REQUEST_ID"}

Pass one starting image in images_list and optionally describe the desired motion with a prompt.

Reference-to-video

curl -X POST https://api.muapi.ai/api/v1/happy-horse-1-reference-to-video-1080p \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"The character walks toward camera","images_list":["https://example.com/character.jpg"],"aspect_ratio":"16:9","duration":5}'

# Response: {"request_id":"REQUEST_ID"}

Anchor a scene with one to nine reference images and a prompt describing motion, framing, and mood.

Video edit

curl -X POST https://api.muapi.ai/api/v1/happy-horse-1-video-edit-1080p \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"Change the jacket to bright red","video_url":"https://example.com/source.mp4","audio_setting":"origin"}'

# Response: {"request_id":"REQUEST_ID"}

Provide a video_url and natural-language edit instruction; optional reference images and audio_setting refine the result.

HappyHorse 1.0 API FAQ

What is HappyHorse 1.0?

HappyHorse 1.0 is Alibaba's open-source AI video model family for expressive text-to-video, image-to-video, reference-to-video, and natural-language video editing.

Is HappyHorse 1.0 available now?

Yes, it is available in the Muapi Playground beta on Pro and Business plans. Public API-key access is planned for a later release.

What resolutions are supported?

Each generation and editing mode has a 720p and a native 1080p variant. Use 720p for iteration and 1080p for higher-resolution delivery.

How many reference images can I provide?

The reference-to-video variants accept one to nine reference images. Video-edit variants accept up to five optional reference images.

What inputs do image-to-video requests need?

Pass one image in images_list. The prompt is optional for the 1080p image-to-video variant and can guide camera movement, motion direction, or mood.

Can HappyHorse 1.0 edit existing videos?

Yes. The video-edit variants accept a video_url and a natural-language instruction, with optional reference images and audio_setting controls.

How is HappyHorse 1.0 priced?

Current Muapi pricing is $0.18/sec for 720p text/image-to-video and $0.36/sec for 1080p; reference-to-video and video-edit are $0.21/sec at 720p and $0.42/sec at 1080p. Check the live Playground and plan gate before production use.

Explore HappyHorse 1.1 →Read about the newer HappyHorse family and its live model variants.Browse video models →Compare HappyHorse with the full Muapi text-to-video catalog.Compare AI Video APIs →Choose a video-generation API for your production workflow.

Ready to preview HappyHorse 1.0?

Use the closed Playground beta to test expressive video generation, reference conditioning, and natural-language editing.

View Pro and Business Plans Preview in Playground