Can confirm the workbench does with `claude-sonnet-4-20250514` returns Biden (with a claimed April 2024 cutoff date) while Chat returns Trump (as encoded in the system prompt, with no cutoff date mention). Interesting
People use "who's the president?" as a cutoff check (sort of like paramedics do when triaging a potential head injury patient!), so they put it into the prompt. If people switched to asking who the CEO of Costco is, maybe they'd put that in the prompt too.