Groupmates or classmates?

[englishhobby]

When we are talking about fellow students at university who are in the same group/class for studies, should we use the word groupmates or classmates?

 

[Tarheel]

I would say classmates. (I suppose that a groupmate could be a part of any group, and not just a class.)

 

[SoothingDave]

"Groupmate" sounds odd to me.

 

[Tdol]

It's not a natural term to me either.