The version of our Telerik UI for ASP.NET MVC product you specified should work with MVC5, as we support this version of the ASP.NET MVC framework since it was released officially.
To check the version of the MVC framework against which the Kendo.Mvc assembly is compiled, right-click it, go to Properties -> Details and check the number before the last dot in the version number of the assembly. For instance 2015.2.805.5
45 would indicate that this assembly is compiled against MVC5
As for our MVC6 support, you can read this blog
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