Neuralink rival sets brain-chip record with 4,096 electrodes on human brain

In April, a neurosurgery team from the Mount Sinai Health System placed one of Precision's devices containing four electrode-containing films—totaling 4,096 electrodes—onto the brain of a patient who was having surgery to remove a benign brain tumor. While the patient was asleep with their skull opened, Precision researchers used their four electrode arrays to successfully record detailed neuronal activity from an area of approximately 8 square centimeters of the brain.

This isn't even their final form.