Describe a world. Then walk around inside it.

What is an AI world model?

Most AI video tools hand you a finished clip to watch. A world model hands you a place to enter. You describe somewhere in a sentence, the model builds it, and then it streams live video as you move — reacting to you while it generates, instead of playing back something fixed.

What is Happy Oyster?

Happy Oyster is Alibaba's realtime interactive world model, available on Mina Labs through fal. It takes text, images and live input and produces continuous audio-video of a world you can walk through and direct. Build a world once and it is yours permanently: the same world can host as many visits as you like, and every visit records a replay video you keep.

What is the difference between Adventure and Directing mode?

Adventure puts you inside it — walk and look around in first or third person with the movement controls. Directing puts you behind the camera — type a beat like “a giant robotic dinosaur suddenly appears” and the world answers as it streams.

What does it cost to create an AI world?

79 credits to build a world, which you keep forever. Entering costs 33 credits for 60 seconds, 50 for 90, or 66 for 120. You pay for the time up front and the session stops by itself, so it can never run over. New accounts get 20 free credits, and there is no subscription.

Do I keep a video of my session?

Yes. When a session ends, a replay of everything you did is composed and offered as a download at no extra cost — you already paid for the session that made it.

How is this different from an AI video generator?

A video generator returns a clip you watch. A world model returns somewhere you go. If you want a cinematic shot, use Veo or Kling. If you want to walk around inside the idea, build a world.