Final version of Microsoft Office 2013 has already released to manufacturing & which is now available for downloads to MSDN and TechNet subscribers .
If you are a MSDN or TechNet subscriber, you can log into your account and download Office 2013 Professional Plus RTM . Both 32 bit (x86) and 64 bit (x64) versions are available for download. File size of 32 bit version is 667 MB and for 64 bit version it is 769 MB.
MSDN users can download it from here
Technet users can download it from here
Users without MSDN or Technet subsription can download the free Customer Preview version of Office 2013 from here