The Pixel 2+ does have a coprocessor for compute workloads (the Visual Core). However users here have reported this working on a Pixel 1, which doesn't have tha

The Pixel 2+ does have a coprocessor for compute workloads (the Visual Core). However users here have reported this working on a Pixel 1, which doesn't have that chip. The Verge says it may reach other devices later. It sounds like it's both better than the old dictation model, and significantly smaller.