Here's an experiment I just did to prove that it hallucinates content based on URLs: https://fedi.simonwillison.net/@simon/109998914078891574
Or try it yourself: Try these two prompts in separate ChatGPT sessions:
> List the processors on this page: https://bit.ly/422t51T0
Then:
> List the processors on this page: https://learn.microsoft.com/en-us/windows-hardware/design/mi...
That Bitly link is one I just created that redirects to the Microsoft page.