There are different Gurobi versions displayed in the Instant Cloud Manager web interface because the Compute Server is backward compatible with previous versions.
The Actual Version displayed in the Machines window is the version of the Gurobi Compute Server that is currently running on the server. By default, an 8.x/9.x pool uses the latest version (currently 9.5.1):
Clients can use any Gurobi versions that are supported by the 9.5.1 version of Compute Server: 8.0.0, 8.0.1, 8.1.0, 8.1.1, 9.0.0, 9.0.1, 9.0.2, 9.0.3, 9.1.0, 9.1.1, 9.1.2, 9.5.0, and 9.5.1. The versions that are actually used are displayed as Runtimes.
The Gurobi version used by a client is listed as the Runtime in the Jobs window for a particular job:
The version displayed in the OPTIONS tab of the Machines window is the Gurobi version requested for the pool. For an 8.x/9.x pool, this is currently listed as 8.0 when it should be 9.5.1:
We are currently in the process of fixing this.