Genie 4 is a world model. Instead of making a fixed video clip, it builds a scene frame by frame as you move through it, reacting to what you do. You describe a place in text, or give it an image, and then walk around with keyboard controls.
Four upgrades stand out over Genie 3, which Google showed in August 2025:
- Sound. It’s DeepMind’s first real-time world model that makes audio itself. Each world has its own ambient sound, from wind in trees to waves on a beach, and characters can hold conversations that react to you.
- Longer worlds. Scenes stay consistent for about two minutes, double the one minute Genie 3 managed.
- Live changes. You can type a request mid-session, like new weather, a different camera angle or an extra person, and the world adapts without starting over.
- Better people and physics. DeepMind calls human movement its biggest leap, and says it handles collisions and aerodynamics more convincingly.
Behind the scenes, Gemini 3.8 Flash acts as a guide. It breaks your goal into steps, checks each new frame to confirm a step worked, and changes its plan if the world drifts or you interrupt. Another Gemini model keeps the look and behavior of the world grounded in reality.
DeepMind sees this as an early step toward what it calls hybrid world models. In that setup, a language model like Gemini plans the structure and story of a scene in the background, while Genie handles what you actually see and hear. Google also links the work to its long-term goal of artificial general intelligence, AI that can handle most tasks a person can, because understanding how the physical world behaves is a big piece of that.