Verdict: buy individual tickets if you're visiting 3 sites or fewer; the Paris Museum Pass only pays off from 4 paid sites upward in a short window. • Individual tickets: e.g. Orsay with audio guide from around €82, and you lock in your time slot when you book — handy at the busiest museums. • The Pass: covers dozens of museums, but you still have to reserve a timed slot at top venues like the Louvre and Orangerie, and it never covers temporary exhibitions (always sold separately). • Tip: book popular museums 1–3 weeks ahead; most first-timers fit in fewer than 3 museums, so individual tickets are usually cheaper and simpler.