What is Transformer? Plain-English Definition

In more detail

The transformer is the 2017 invention that kicked off the modern AI era. Its breakthrough: instead of reading a sentence one word at a time, it weighs every word against every other word simultaneously — so meaning that depends on far-apart words snaps into focus.

That’s why models finally understood that ‘bank’ means one thing in ‘river bank’ and another in ‘bank account.’ Nearly everything in this dictionary — every LLM, most image and audio models — is built on this one design. The ‘T’ in ChatGPT stands for transformer.

📌 See it in action

Read ‘The trophy wouldn’t fit in the suitcase because it was too big.’ You instantly know ‘it’ means the trophy. A transformer can too, because it considers ‘it’ against every other word at once — exactly the skill older word-by-word systems kept fumbling.

Goes with

LLM →Parameters →Pretraining →

Now put the vocabulary to work.

Meet the models →Which AI is mine?