The movie was made in 1983 and it already uses the word "hallucination": "what you see on these screens up here is a fantasy; a computer-enhanced hallucination" https://www.imdb.com/title/tt0086567/quotes/?item=qt0453841&...

It's eerily prescient how much the computer in Wargames resembles a present-day LLM with tool use, with the tools being ICBMs...

It concluded that the only winning move in the global thermonuclear war was not to play. That is what separates works of fiction from reality.