At the time of writing, the release buid version of OpenSolaris is 111b, and the latest dev build is 124.

To upgrade, open a terminal and run the following commands:

user@opensolaris:~$ pfexec su -
root@opensolaris:~# pkg set-publisher -O http://pkg.opensolaris.org/dev opensolaris.org
root@opensolaris:~# pkg image-update