[NothingAboutAny]

For coding the worst I've seen recently is gemini using or suggesting library methods that dont exist in c# which it catches when it builds the project (something I've told it to do to catch these.)

but for research it makes shit up all the time, I asked GPT5.5 to make me a build for Rogue Trader and not only did it use out of date info, it made up a bunch of skills that were NEVER in the game. I attribute that to there not being enough online information in the wikis or whatever but I wish it would just say "I dont know" instead of hallucinating but I know that's not how the tech works.