It's a good question because it's hard to say. Our technology, economy, social/ economic classes are so different now. someone should do a study on it and get all the facts/ figures and compare, maybe a sociologist, economist etc.
I'd say roughly....about the same. Of course the value assigned to dollars change, but that always does and is meaningless. But the cost of life I'd say is now about the same.
Costs that are the same....mortgages/ housing, utilities, college education, medical care.
Costs that are more now...taxes on all but the rich, retrograde taxes/ fees aimed at the poor (criminal fines, user fees, license fees, traffic tickets, cigarette taxes are way more now). Gasoline. Beef and good food, lower end restaurants, in person entertainment.
Costs that are less now...cars, air transportation, vacations, cheap and processed food, junk food, turkey, electronic entertainment, TV's, all electronic stuff/ appliances, clothing.
So, about the same....note...cost of living in 1964-2000 was less than the 50's, so if it's the same now our cost of living is now the highest since the 50's.