The OctaneRender for Poser plugin has been made available as a 3 month free trial (ie. nothing to pay for Octane or the Poser plugin for 3 months) as part of the OctaneVR competition. See http://home.otoy.com/vr-competition/ for details.
Also make sure you try the Try Octane In Your Browser option - it is very cool.
a reminder, you will need Windows 32 or 64 bit, or OSX 64 bit, Poser 9/10
or Poser Pro 2012/2014, and an NVidia card (GTX 500 series or later).
OpenCL support is scheduled to be added in Octane 3.