Neuralink Brain Uploads: How Close to Simulations and Immortality?

• Neuralink's implant records from 1,024 electrodes in one small area of the motor cortex, a tiny fraction of what a brain upload would need.
• Neuralink uses computer simulations of motor cortex activity to develop its decoders, which is a long way from simulating a whole mind.
• Elon Musk has talked about saving and uploading minds to robots, but no company has a path to that today.

Where Neuralink starts

Neuralink's N1 implant records from 1,024 electrodes on flexible threads in the motor cortex. People with paralysis use it to control cursors and robotic arms at speeds that match able-bodied mouse users. As of late October 2025, 13 participants were using the device, and Neuralink reported 21 on January 28, 2026. The median participant now reaches about 10 bits per second, according to Neuralink's October 2026 update.

Elon Musk describes this high-bandwidth interface as a first step toward working closely with AI. A whole-brain emulation, by contrast, would require mapping all of the brain's roughly 86 billion neurons and trillions of connections. Neuralink's roadmap targets 25,000 channels per implant by 2028, which would still record from a small fraction of one brain region.

Simulations at Neuralink

Neuralink uses models of motor cortex activity to train and test decoders before they reach participants. Its 2026 decoders were pretrained on over 50,000 hours of real neural data from participants, which shows how much data even one function, moving a cursor, needs. Simulating a complete mind would be a different problem from simulating one area's movement signals.

Uploads and immortality

A brain upload would copy a person's mind to a computer or a robot. Neuralink's planned Blindsight implant would stimulate the visual cortex; human trials have not started. If it works, it would show that the brain can accept artificial input, which is one small piece of what uploads would need.

Elon Musk stated in July 2025 that immortality becomes feasible by uploading saved mind versions to humanoid robots. Neuralink has not described any device or research program to save a person's mind.

The obstacles are large. Neural signals drift from day to day, recording is limited to a few areas, and nobody knows how to capture memories or personality from electrical activity.

Milestones so far

Neuralink's Summer 2025 update confirmed 7 human implants at the time, along with trials in Canada and a UAE site, and an FDA Breakthrough Device Designation for speech. Neuralink reached about 20 implants by the end of 2025. After changes made following the first participant's surgery, Neuralink reported higher signal quality in 18 of the next 20 participants and says it is still improving thread retention.

This article was first published in October 2025 and corrected in October 2026; the latest patient count is on the patient table.