Neuralink engineers spent 72 hours at the home of Kenneth, a participant in its VOICE speech-restoration study who has lived with ALS for seven years, rapidly prototyping features to make communicating by thought more seamless. In an October 29 video and blog post, the company said the sprint compressed an estimated two to three weeks of progress into three days and more than 30 app versions, each tested with Kenneth on the spot.

The headline prototype connects the implant to xAI's Grok: Kenneth imagines saying "Hey Neuralink" followed by a task, and a Grok agent on his computer wakes up and carries out the operation itself. The team also built neural voice activity detection, which senses when Kenneth is preparing to speak and starts decoding within milliseconds — removing the button press that speech decoding used to need — and wired Bloom, Neuralink's speech app, into iPhone calling, so his brain-decoded speech feeds straight into a call. Kenneth used it to call his wife. Other prototypes included a lock-screen Live Activity so speech can start without unlocking the phone, and iOS keyboard dictation routed from the implant.

Neuralink is explicit that all of this is experimental: the devices remain investigational, have not been approved by the FDA or other regulators, and the new features are prototypes from a single at-home sprint rather than a shipping product. Elon Musk shared the demos on October 30.