What Exactly is an "AI Model"?
An AI model is not a traditional computer program with lines of code telling it "if this, do that." Instead, it is a massive statistical mathematical network trained to understand relationships between words, concepts, and logic.
The structural blueprint. Modern Large Language Models (LLMs) use the Transformer architecture, which allows the AI to pay attention to multiple words across a page simultaneously rather than reading one word at a time.
The learned knowledge. During training on billions of books and articles, the model calculates billions of numerical "weights" that store grammar, factual connections, reasoning steps, and idioms.
The translator. Computers cannot read letters; the tokenizer converts your human words into numbers (tokens), feeds them through the weights, and translates the output numbers back into fluent English.