Siddhartha Lahiri

Build Your First LLM from ScratchBack

Summary: The Complete Picture

Here's the complete journey from "two plus three" to "five":

Training: How the Factory Learns

Child robot learning math with number blocks — 1. Learn from examples

Robot learning through trial and error — 2. Improve through feedback

Generation: The Assembly Line

Tokenization factory — 1. Tokenize: words → numbers

Embedding factory — 2. Embed: numbers → vectors

Positional encoding factory — 3. Position: add word order

Attention factory — 4. Attention: words communicate

Output layer factory — 5. Output: score every word

Generation factory — 6. Generate: pick the answer

Result: "two plus three" → "five"

Helpful?

Step 6: Generation How It Learns