Kunlun Tech announced that Matrix-Game 4.0, released and open-sourced in October, is now officially available on Reactor, a real-time world model platform. This is the first platformized opening since its open-source release, allowing users to enter three worlds—Castle, Ancient Egypt, and City Racing—in a browser and “generate while playing.” Reactor is headquartered in San Francisco and supports integration with just a few lines of code through a unified SDK and API and a globally distributed GPU network. It officially announced its launch on November 7.
Matrix-Game 4.0 is the world’s first video large-model game to run on a single consumer-grade GPU. On a single NVIDIA RTX 5090, it achieves real-time interaction at 480p and 60 FPS, with end-to-end latency from keypress to first frame below 150 milliseconds, steady-state generation of 83 FPS for single-step denoising, and peak VRAM of 18.5 GiB.
At its core is the execution framework Harness: Coding Agent builds lightweight games with code; the game engine maintains world state and interaction rules and outputs structured frames and dynamic semantic conditions; and the video model renders the visuals. The decoupling of these three resolves three major pain points: reliance on multi-GPU clusters, difficulty in state maintenance, and long-horizon drift. Rules are guaranteed by code, and the model has complete game logic such as HP and shields.
Engineering pipelines such as controllable video training, few-step autoregressive distillation, and real-time inference reduce dependence on fine-grained 3D assets. The model has been open-sourced. With the Coding Agent, creators can adjust scenes and gameplay in natural language, lowering the barrier to a single line of prompt. It covers directions such as game prototyping, UGC open worlds, digital simulation, and robot simulation.
Matrix-Game 4.0 addresses “playability,” while Reactor addresses production-grade latency and stability for delivery. The two parties will continue to optimize inference performance and update the platform in sync with higher-resolution refiner, multiplayer consistency, and more game genres. Fang Han, Chairman and CEO of Kunlun Tech, said at WAIC 2026 that “2026 will be the first year of world models,” predicting that the gaming industry will be transformed first and that open-world games will no longer rely on teams of hundreds building them over years.
Github: https://github.com/SkyworkAI/Matrix-Game.git
Huggingface: https://huggingface.co/Skywork/Matrix-Game-4.0
Project website: https://matrix-game-v4-0.github.io/page/
