This sounds more like an issue with whatever web search/index tool GPT is using rather than the language model itself.

Opus 4.5 often does this as well. I’ve been seeing it more days than not recently. It drives me nuts. Is it worse than citations that don’t exist or citations that are “real” but don’t actually contain any salient content? I’m not sure.

Don't worry, its "safety" features will shield all corporate liability while your kids are indoctrinated by 4chan written "history" regurgitated to you through Microsoft brand "AI"!