# HappyHorse 1.1 for game development

Vendor: Alibaba. Type: Video. Status: live.

Native audio with multilingual lip sync, written straight into the prompt.

HappyHorse 1.1 is an Alibaba video model with synchronized native audio and multilingual lip sync, so spoken lines can go straight into the prompt. It placed in the top ten for both text to video and image to video on the Artificial Analysis video arena in September 2026. In Summer it renders 720p clips from a prompt, a still or up to nine reference images.

## What it is good for in games

- Talking NPC and narrator clips with lines written in the prompt.
- Character intros for trailers in several languages.
- Animating a portrait that speaks one line of dialogue.

## In Summer Studio

- HappyHorse 1.1 (Text to video)
- HappyHorse 1.1 (Image to video)
- HappyHorse 1.1 References (Reference to video)

Cost depends on the models you choose. Your dashboard shows spend as it happens.

Try it: https://www.summerengine.com/studio?tab=video&generator=alibaba%2Fhappy-horse%2Fv1.1%2Ftext-to-video

## Use it from Claude, Cursor or Codex

Call summer_generate_video with model: "happy-horse-1.1" through the Summer MCP server. Setup: https://www.summerengine.com/mcp

## Questions

### What is HappyHorse 1.1 good for in game development?

HappyHorse 1.1 is an Alibaba video model with synchronized native audio and multilingual lip sync, so spoken lines can go straight into the prompt. It placed in the top ten for both text to video and image to video on the Artificial Analysis video arena in September 2026. In Summer it renders 720p clips from a prompt, a still or up to nine reference images. Typical game uses: talking NPC and narrator clips with lines written in the prompt; character intros for trailers in several languages; animating a portrait that speaks one line of dialogue.

### What can HappyHorse 1.1 generate, and how long are the clips?

In Summer, HappyHorse 1.1 supports text to video, image to video, and reference to video. Generated clips run 3, 5, 8, 10, and 15 seconds, in 16:9, 9:16, 1:1, 4:3, 3:4, and 21:9 aspect ratios at 720p and 1080p.

### Can I use HappyHorse 1.1 from Claude Code, Cursor or Codex?

Yes. Connect the Summer MCP server to Claude Code, Cursor, Codex or another MCP client, then ask your agent to generate with summer_generate_video with model: "happy-horse-1.1". Setup instructions are at summerengine.com/mcp.

### Where do HappyHorse 1.1 results go?

Every generation is saved to your Summer asset library. From there you can download it or bring it into a Summer Engine project.

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