First high-accuracy real-time speech neuroprosthesis

UC Davis / BrainGate2 — A BrainGate2 intracortical BCI at UC Davis decoded a man with ALS's attempted speech into on-screen words and synthesized voice in real time at up to ~97-99% accuracy from a large vocabulary (NEJM) — the first speech BCI accurate enough for natural conversation. It has since been used independently at home for thousands of hours, marking the shift from lab demo to daily communication.