Overview

• Dubbed CraftGPT by builder sammyuri, the project runs language‑model inference entirely in Minecraft using redstone with no command blocks, datapacks, or logic‑altering mods.
• The in‑game computer spans about 1,020 × 260 × 1,656 blocks—roughly 439 million blocks—to carry out tokenization, matrix operations, and decoding.
• The model comprises approximately 5,087,280 parameters across six layers with a 240‑dimension embedding, a ~1,920‑token vocabulary, and a 64‑token context window, with most weights quantized to 8 bits.
• For demonstration, Distant Horizons was used to film the massive structure, and the MCHPRS server boosted the tick rate by around 40,000× to make inference feasible on video.
• Even with acceleration, each response takes a couple of hours and could take years at normal speed, reinforcing that this is an educational proof of concept rather than a practical chatbot.