Good point. There are also a huge amount of open source calculators, planners and other tools that these models have undoubtably been trained on [0]

There are full blueprints for factories online available to copy-paste in its training data [1]

I wouldn't be surprised if you can beat the game by just copying a bunch of blueprints from the web and chaining them together.

This is an old game relatively speaking and its been optimized to hell.

0: https://factoriolab.github.io/2.1

1: https://factorioprints.com