Cyanogen OS 12.1.1 Update
Cyanogen - Cortana FAQ
In the Cyanogen OS 12.1.1 update, we are excited to introduce Microsoft Cortana. What makes this such an exciting partnership is that by having Cortana’s voice command capability deeply integrated into the Cyanogen ecosystem, we’re opening the door to future capabilities that don’t currently exist.
All you have to do is say "Hey Cortana" to wake her.
Once awake, from setting reminders and scheduling meetings, to calling and texting friends, Cortana helps you do more with hands-free multitasking. Whether you're glancing at your lock screen or immersed in an app or game, Cortana is at attention as soon as you say "Hey Cortana." Immediately she will go to task.
Cyanogen - Cortana FAQ