Definitely depends on the field. Most “humanities” studies require a masters first, although for that reason many PhD programs include the step of getting your masters so it can all be done as a single track. So still a standard ~6 year program but you get both, masters after the first 3 and then PhD after 3 more. I’ve only ever run with folks in humanities I’m realizing, so I didn’t even realize there were PhDs you could get without a masters