>Nobody should ever use the Default model. It's their most heavily performance optimized model and performs worse on reasoning tasks than the Plugins model, even on within-context-size tasks.

I wish to explore this. My experience is your reverse, default is smart and almost never hallucinates, but I have sent the plugin or web search model to URLs asking it produce a summary and witnessed it misunderstand nuanced content and at times hallucinate from whole cloth, generating answers about a completely unrelated topic.