Oasis is the first playable, real-time, open-world AI model developed by Decart AI. It is an interactive video game entirely generated end-to-end using a Transformer, based on frame-by-frame generation. Oasis can receive user keyboard and mouse inputs to generate gameplay in real-time, internally simulating physics, game rules, and graphics. The model learns from direct gameplay observations, enabling users to move, jump, pick up items, destroy blocks, and more. Oasis is viewed as the first step toward researching more complex interactive worlds and may potentially replace traditional game engines in the future. Its implementation requires improvements in model architecture and breakthroughs in inference technology to facilitate real-time interaction with users. Decart AI employs the latest diffusion training and Transformer modeling methods, combining them with large language models (LLMs) to train an autoregressive model capable of generating video based on user actions. In addition, Decart AI has developed a proprietary inference framework to maximize the utilization of the NVIDIA H100 Tensor Core GPU and support the upcoming Sohu chip from Etched.