My late 2013 MBP 15 (16GB 1TB 2.6) randomly freezes 2-3 times per week, sometimes more. It seems to happen more frequently when under CPU load, but not exclusively. The mouse freezes, the fan slowly spins down, and it requires a hard reset.

I have two 1920x1080 external monitors (hdmi and thunderbolt) which seems to be a commonly reported configuration with crashes.

It came with Mavericks and has done this ever since I got it, under all versions of Mavericks