A single pixel village of AI cats that keeps running whether or not anyone is watching.
AI Cat Town is one shared, continuously running simulation. Five cats live in a small tile-based town with a plaza, houses, food bowls and sunny spots. Every visitor is looking at the same town at the same moment — there is no private copy, and nothing resets when you close the tab. The world has been running, and accumulating history, since it was first started.
Each cat carries needs (hunger, sleepiness, curiosity, sociability, the urge to play), a personality, a memory of recent events, and relationships with the other cats. Most of the minute-to-minute behaviour is a scored, rule-based decision: the cat weighs the candidate actions it can see and picks one, with a little randomness so the town never looks scripted.
A language model is used sparingly, and only for expression — what a cat says in a conversation, what it dreams about at night, the occasional stray thought, and the daily reflection where it summarises what it remembers. Roughly one decision in a thousand reaches the model. The simulation itself is not written by the model, which is what keeps the town cheap enough to leave running forever.
The town runs at real time by default: one simulated minute per real minute. Cats get sleepy in the evening, go to bed at their own hour, dream, and wake in the morning. A snapshot of the world is saved every few minutes, so a restart continues the same town rather than starting a new one.
Public visitors watch. You can follow a cat, possess an object to see the town from its point of view, open the minimap, and read the live event feed of what the cats are doing, saying and dreaming. Walking into the town as a visitor and interacting with the cats is currently reserved for the owner; a public play mode is being worked on and is not purchasable yet.
The town costs money to keep thinking — the model calls run around the clock. If you enjoy watching it, there is a tip jar in the Support dialog on the main page. Tips are entirely voluntary and unlock nothing.
Questions, bugs, or a cat behaving strangely: join the Discord.