Language Model Builder
languagemodelbuilder.com- Category
- Education
- Pricing
- Free
- Type
- APP
- Builder
- @felixrieseberg
- Added
- Jul 22, 2026
About
A free Mac app that teaches you how language models work by letting you build one from scratch — train a tokenizer, pick data, pre-train, fine-tune, and chat with your creation. It pairs an interactive textbook with a native training workbench powered by Apple's MLX, all running locally on your Mac.
Why it made the leaderboard
If you want to actually understand how LLMs work rather than just run them, this app walks you through building one from scratch — training a tokenizer, pre-training, fine-tuning, and chatting with your own model — all locally on your Mac via Apple's MLX, paired with an interactive textbook. It's a hands-on learning experience, not another model runner.
Tags
machine-learningllmeducationmlxtrainingmactokenizergpt
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