Answer
Yes, paying rent in full in advance may result in a discount, sometimes a substantial one. Under this arrangement, the tenant pays the full amount for the agreed period upfront, and the owner lowers the price in exchange for guaranteed payment.
The discount makes sense only under clear conditions. For temporary housing, the address, dates, total amount, refund rules, included services, and possibility of renewal are important. A large advance payment to an unfamiliar owner without written confirmation increases the risk.
If the property has already been inspected and the terms have been agreed, prepayment can be a way to reduce costs. If the accommodation is chosen remotely or for a short initial period after arrival, it is wiser not to pay a large amount solely for the promised discount: first, make sure that the apartment, neighbourhood, and owner are suitable.