# Zing

Zing-0.5 is a 5B causal world model that keeps rolling a scene forward while keyboard actions and text prompts change it mid-stream. It starts from text or a single image, and the weights are Apache-2.0.

Organization: Seedleap. Released: 25 August 2026. Kind: Games.

## What you control

- W/A/S/D and I/J/K/L keys
- Text prompts during the rollout
- A text or single-image start

## License

Weights: Available (https://huggingface.co/seedleap/zing-0.5). Declared license: Apache-2.0.
The weights' model card declares Apache-2.0, a permissive license that allows commercial use. Check what the model was built on, because a base model's terms can still apply.

## Real-time

Real-time, per authors. Real-time interaction; outputs 24 fps video.

## How to run it

1. Run bash run.sh with a messages file of prompts and actions; ready-made examples cover text-started, image-started and prompt-switched rollouts.
2. To serve it, launch it with SGLang and drive it from examples/zing_0_5/client.py.
3. Sliding-window options (--local-attn-size and --sink-size) set how much past video the model attends to.

## Where to try

No hosted destination verified.

## Sources

- [Project source](https://github.com/seedleap/zing-world-model)
- [Weights and model card](https://huggingface.co/seedleap/zing-0.5)

## Questions

### Is Zing open source?

Zing publishes downloadable weights under Apache-2.0. The declared license is permissive.

### Can I use Zing commercially?

The weights' model card declares Apache-2.0, a permissive license that allows commercial use. Check what the model was built on, because a base model's terms can still apply.

### Does Zing run in real time?

Yes, according to its authors. Real-time interaction; outputs 24 fps video. This directory has not measured it independently.

### Where can I try Zing?

No hosted version was verified; run the published weights yourself.

### What does Zing take as input?

You give it W/A/S/D and I/J/K/L keys, text prompts during the rollout and a text or single-image start.

### How do I run Zing?

Following the official instructions: Run bash run.sh with a messages file of prompts and actions; ready-made examples cover text-started, image-started and prompt-switched rollouts. To serve it, launch it with SGLang and drive it from examples/zing_0_5/client.py. Sliding-window options (--local-attn-size and --sink-size) set how much past video the model attends to.

### What are alternatives to Zing?

Similar models in this directory include Agora (Odyssey) (no public weights, service terms), Hunyuan-GameCraft (open weights, custom terms) and Matrix-Game 2.0 (open weights, permissive license).

Checked 2026-10-23. Corrections: https://github.com/windflow-labs/world-model-directory