Digit v4 is Agility Robotics' fourth-generation bipedal humanoid, optimized for warehouse and logistics environments. Its novel bipedal locomotion architecture, inherited from the Cassie research platform, provides superior energy efficiency on flat floors compared to fully humanoid designs. Amazon has deployed Digit v4 in its fulfillment centers for tote handling and goods-to-person workflows, making it one of the few humanoids with large-scale commercial deployment.