To Obtain a Token

If you give an LLM a few words, a GPU, and a few watts, it'll spit out a token. But how exactly does this all work under the hood? To uncover the magic of LLMs, we'll be implementing Qwen3 from scratch to see what's really going on.

test

from transformers import AutoTokenizer, AutoModelForCausalLM

MODEL_NAME = "Qwen/Qwen3-4B-Instruct-2507"
model = AutoModelForCausalLM.from_pretrained(MODEL_NAME)
tokenizer = AutoTokenizer.from_pretrained(MODEL_NAME)