SAS/STAT 12.3 is essentially a maintenance release of SAS/STAT software that runs on SAS 9.4.
In addition, the procedures that make up the SAS High-Performance Statistics product are available with SAS/STAT for use in single-machine mode. Depending on data characteristics and model complexity, you might see performance improvements over comparable SAS/STAT functionality that is not multi-threaded. Also, these procedures provide some new features; for example, the HPGENSELECT procedure provides model selection for generalized linear models.
For more information, see Overview of SAS/STAT High-Performance Procedures in SAS/STAT User’s Guide: High-Performance Procedures.
SAS/STAT 13.1 is a major release ...