I am a graduate student trying to get a jump start on my college loans form undergrad and my current program.

Im specifically interested in working with a private loan I got a few years ago with a 9.75% rate. As of now the total repayment is at about $11,000. My question is does it make sense to pay this off using a lower cost loan (5.45%) I have access to through my school? Am I accruing less interest this way or would it just be better to start repayment on the original private loan?

Thank you!