- [Narrator] ChatGPT, it allows users to engage in a dialogue with a machine that seems uncannily human.

It was first released in 2018, but it was a subsequent version that became a global sensation in late 2022.

- This promises to be the viral sensation that could completely reset how we do things.

- Cranking out entire essays in a matter of seconds.

- [Narrator] Not only did it wow the public, it also caught artificial intelligence innovators off guard.

- It surprised me a lot that they're able to do things that we didn't think they could do simply by learning to imitate how humans respond.

And I thought this kind of abilities would take many more years or decades.

- [Narrator] ChatGPT is a large language model.

LLMs start by consuming massive amounts of text, books, articles, and websites, which are publicly available on the internet.

By recognizing patterns in billions of words, they can make guesses at the next word in a sentence.

That's how ChatGPT generates unique answers to your questions.

If I ask for a haiku about the blue sky, it writes something that seems completely original.

- If you're good at predicting this next word, it means you're understanding something about the sentence, what the style of the sentence is, what the feeling of the sentence is, and you can't tell whether this was a human or a machine.