Elon Musk's brain implant company Neuralink has demonstrated new technology connecting the Grok artificial intelligence assistant directly to the human brain during clinical tests.
In a demonstration conducted with a participant in the VOICE clinical trial, the user activated Grok using thought alone and instructed the software agent to perform computer tasks.
The demonstration marks an important milestone for brain-computer interface systems, showing that neural implants can communicate directly with autonomous artificial intelligence models rather than only controlling standard computer cursors.
Thought activation of Grok
To operate the assistant, the participant activated the system by mentally thinking the phrase Hey Neuralink. The user then conveyed the desired computer task through imagined speech, allowing the software agent to receive the instruction and execute it independently on the screen.
Neuralink conducted the test as part of its ongoing VOICE clinical trial, which investigates speech restoration for patients with severe motor impairments. The trial explores how well neural implants can decode intended speech directly from brain activity when physical articulation is impossible.
Grok is an artificial intelligence model developed by xAI, the technology startup founded by Musk in 2023 to compete with rival systems such as ChatGPT. While users typically interact with Grok by typing text prompts into a computer or mobile phone, the Neuralink demonstration connected the software directly to decoded neural impulses.
Brain-computer interfaces work by capturing electrical signals produced by neurons in the brain, converting those biological impulses into digital data that computers can interpret. Neuralink, co-founded by Musk in 2016, develops custom implants fitted with ultra-thin electrode threads that record neural activity and transmit data wirelessly to external devices.
Automated neural speech detection
Alongside the artificial intelligence link, Neuralink introduced an automated neural speech detection system that eliminates the need for physical interaction. In earlier versions of the company's setup, users were required to press a physical button to start and stop the speech decoding process.
The new technology automatically detects the exact moment a participant imagines speaking, initiating and managing the decoding process without manual assistance. Company engineers designed the automation to significantly improve communication for individuals living with severe physical paralysis.
The system also provides real-time visual feedback by displaying the intensity and distribution of neural signals recorded by the implant. By watching the signal visualisations on screen, users can mentally test different speech styles to discover which thought patterns generate stronger signals, helping to refine decoding accuracy over time.
Direct telephone calls on iPhone
Neuralink expanded its speech technology beyond computer tasks by integrating the brain-computer interface directly with Apple's iPhone. The integration transfers synthetic speech generated from decoded brain activity straight into the smartphone's microphone audio stream during live phone calls.
When the participant speaks through imagined thought, the system synthesises the voice and feeds it into the phone call, enabling the recipient on the other end to hear the computer-generated speech as an ordinary telephone conversation.
During testing, the study participant used the neural link to place a phone call to his wife. Neuralink stated that the trial held personal meaning for the couple, who had communicated primarily through telephone calls during the early stages of their relationship.
Assistive keyboard and mobile updates
Neuralink also developed an iOS keyboard integration that allows participants to enter text directly into mobile applications using neural signals. The company designed the feature for individuals who cannot use physical keyboards or standard voice dictation software due to neurological disorders such as amyotrophic lateral sclerosis.
Amyotrophic lateral sclerosis, commonly known as ALS or Lou Gehrig's disease, is a progressive neurodegenerative condition that attacks the nerve cells controlling voluntary muscle movement. As motor neurons deteriorate, patients gradually lose the ability to walk, type, speak and breathe independently, while their cognitive awareness and mental faculties typically remain intact.
The company also updated Bloom, its dedicated mobile communication application for brain-computer interface users. The update introduces an improved editing system that allows users to correct misdecoded words more quickly during text composition.
Bloom now also features a lock screen communication tool that allows users to generate speech without needing to unlock their smartphone first. Neuralink developed the software additions during a 72-hour voice hackathon aimed at accelerating communication tools for clinical trial participants.
