Hello,
Yes, SEP 14 is released and is available to all users.
In case you are carrying a valid SEP 12.1 License, you could upgrade the License from Symantec Licensing Portal under SymAccount.
Once done, you would receive the Serial number for Symantec Endpoint Protection 14.
You would be able to download the latest version of SEP 14 from -
https://symantec.flexnetoperations.com/control/symc/registeranonymouslicensetoken
Regards,