Yep, if you have a recent-vintage Radeon graphics card, you can now try the lower-level Mantle API with Battlefield 4. Just go grab the Catalyst 14.1 beta drivers and follow the instructions here to enable the Mantle code path in BF4. Mantle support right now is just preliminary, but it already seems to work fairly well.
I've been playing with the Mantle driver this weekend and have compiled some interesting results. I should have them ready to share with you before long.
In the meantime, if you aren't sure what all the fuss is about, there's no better place to learn about Mantle than Cyril's excellent article on the subject.