The contract is five years; the rate is not
A five-year variable mortgage usually creates a closed five-year commitment while the interest rate moves with lender prime. The contractual term controls maturity and exit rules; it does not guarantee the rate or payment for five years.
Compare the prime adjustment, payment type, compounding, prepayment privileges, and break penalty as one package. The deepest discount is not enough if the payment mechanics do not fit the household.