vRealize Operations Insight is available on a per-processor perpetual license model (which includes unlimited virtual machines and underlying hardware), as an add-on solution to VMware vSphere with Operations Management.
Note: The per-processor licensing only applies to the vSphere datacenter. Anything outside of the vSphere domain would need to get the 25 OSI packs as well. You can mix Operations Insight licenses with the per 25 pack OSI packs. You can also mix Advanced and Enterprise Operations licensing in the same deployment by creating license groups which map the managed objects to those license groups.