User blog comment:Magma MK-II/Characters that shouldn't be here, Part 4: Electric Boogaloo/@comment-366087-20160112100946/@comment-366087-20160112143617

Terminators are a little iffier as they could be viewed as extensions of Skynet which has crossed the Sentience Event Horizon, but otherwise I agree. Especially the lower-numbered models.

However a deleted/director's cut scene from T2 had them pulling out that T-101's CPU and flipping a switch to allow it autonomy. Which implies they are not autonomous by default.

Still, I think the nano-infected nature of the John Connor/Terminator fusion would qualify as Sentient.