Language Model Builder

An educational app that teaches the foundations of language models by letting users build one from scratch. It solves the problem of understanding complex AI technology through hands-on experimentation. It targets developers, students, and curious non-programmers who want to learn AI fundamentals without needing coding or math experience. The app is positioned as a free, local, and interactive alternative to traditional courses, with a textbook-style introduction and native training tools.

Key features

• Interactive textbook with playgrounds
• Build tokenizer and inspect embeddings
• Watch attention and model learning
• Pre-train with custom dataset
• Supervised fine-tuning and DPO
• Chat with trained model
• Local training with MLX acceleration
• Resume from saved checkpoints
• No account or subscription required