Go Deeper Still

The deep end of the deep end. You absolutely do not need this to use AI — but if you want to truly get it, this is where it lives.

Deep Dive into LLMs like ChatGPT

Andrej Karpathy

Why this one The full picture — training, fine-tuning, why models hallucinate, all of it. Long, but it's the one that turns scattered facts into a real mental model.

Let's build GPT: from scratch, in code, spelled out.

Andrej Karpathy

Why this one Actually building one in code. You don't need this to use AI, but if you want to truly get it, nothing else comes close.