LLM from Scratch Tutorial Code Train Qwen 3

Lean how to create an LLM from scratch. In this tutorial you will build Qwen 3, one line at a time. Watch gradients flow, models learn, and AI come alive in realtime. Code on Google Colab GitHub Contents (0:00:00) Intro Demo (0:01:46) Qwen 3 Architecture (0:02:36) Prerequisites (0:04:01) Code Setup Imports (0:05:26) Model Configuration (0:08:26) Qwen 3 Specifics (0:12:24) Training Hyperparameters (0:17:18) Grouped Query Attention Logic (0:18:56) Muon Optimizer Explained (0:29:02) Data Loading Tokenization (0:32:37) RoPE Positional Embeddings (0:36:56) SelfAttention Code (0:44:28) FeedForward . .., freeCodeCamp 20250819 JajSQsFBI