I tried learning Godot with 4o for a few days and almost literally every answer was hallucinated and wrong. Didn't matter if I specified the version of Godot I was using among other specifics. It would even repeat mistakes that I had corrected earlier in the conversation (and it claimed to "save to memory").
Good to know. I did have it hallucinate pretty bad yesterday when I asked it about Microsoft AI Recall. After it kept telling me confidently about Outlook's AI ability to call back messages after being sent, I told it to search the internet on the topic and it came back with accurate data on Microsoft's new AI feature in Windows 11.
It was a really eye-opening experience.