WorldTUI

WorldTUI is a browser experiment by Simon Edwardsson. He fine-tuned a 360M-parameter language model to act as a terminal: you press a key and the model predicts what the next terminal screen looks like. The author says the model was shrunk and fine-tuned from Qwen2.5-Coder-0.5B, trained on terminal sessions recorded from real programs in Docker. You can start from presets such as bash, python, vim, tmux or snake, or paste in your own starting screen. What sets it apart is that there is no real shell or file system behind it; everything on screen is imagined by the model, a small example of a world model. The author is upfront that it is unreliable: reading files back often goes wrong, and Python arithmetic and paths get made up.

Who it's for:Developers and researchers curious about world models and AI running locally in the browser. If you don't write code, you won't need it.

Before you start: Your browser needs WebGPU. The author recommends desktop Chrome or Edge with a physical keyboard; phones are slow, and Firefox ran about 20 times slower in the author's test. Clicking Load model downloads a model of about 208 MB. The author says all inference runs locally in the browser tab and does not mention sending input to any third-party AI. It cannot stand in for a real terminal, and its output should not be trusted. We saw no charge on the page, and no licence is stated for the code or model. The author says the weights will be released later.

Based on the author's site's public information. Not tested by AI Inspiration World.