Felix Rieseberg's free Mac app trains a GPT-2-like LLM in a week
Train a 100-150M parameter model on your MacBook Pro for free.
Deep Dive
A new Mac app called Language Model Builder lets anyone train an LLM from scratch. Default settings produce coherent, grammatical multi-paragraph text in as little as a day. On a MacBook Pro M5 Max, you could train a GPT-2-small-class model (~100–150M parameters on a few billion tokens) in about a week. To avoid disappointment: you will not train a Claude Fable 5 or ChatGPT 5.6 Sol in your garage.
Key Points
- Free Mac app by Felix Rieseberg (creator of ElectronJS, now at Anthropic) for training LLMs from scratch.
- Default settings yield coherent multi-paragraph text in about one day.
- On an M5 Max MacBook Pro, users can train a ~100–150M parameter model (GPT-2-small class) in roughly one week.
Why It Matters
Democratizes AI development by enabling any Mac user to train a small LLM locally, for free.