From Halopedia, the Halo wiki
Caradon-class ancilla have the ability to process instructions. They are considered equal or lower than a Facilitator-class ancilla.
Battle of Epsilon Clarion
On October 14, 2559; Archeon-class ancilla Intrepid Eye stated that "Every ancilla above Caradon class has the ability to process." in an attempt to make the Facilitator-class ancilla at Epsilon Clarion process.
List of appearances