As a F-1 student for >5 years, I'm classified as "resident alien" for tax purpose. I'll change to J-1 for postdoc. Will I remain as "res-alien" or be "non-res alien"?

I am in the US for more than 5 years as a graduate student in F-1 status, and I'm currently classified as a "resident alien" for tax purpose. I'm going to a postdoctoral position for which I'll change to J-1 research scholar status. I wonder will I remain as a "resident alien" or will I be returning to a "non-resident alien"? Thank you!