Future of Dev
Building an LLM from scratch: how tokens become vectors (with actual code)
Computers speak voltage, humans speak words. This creates a problem. The naive fix is a dictionary (Apple = 1, Ball = 2), but it loses meaning. The real solution? Embeddings that turn text into GPS coordinates where 'king' lives next to 'queen' and far from 'banana'. Here's how tokenization and BPE actually work, with Python you can run today.