Pretty sure the patch notes for the just-ended build said the heroic mode flashpoints were operating.

Actually, I just opened my Launcher and can still see the patch notes for the just-ended build. Here's the key items:

All difficulty modes for Operations and Flashpoints now have appropriate drops and mission rewards.


Hard modes are now available at Level 50 for the following Flashpoints:
  • Boarding Party
  • Directive 7
  • Maelstrom Prison
  • Taral V
  • The Battle of Ilum
  • The Black Talon
  • The Esseles
  • The False Emperor
  • The Foundry