Meta’s AI reads typed sentences from the brain, no surgery required

Meta says it can turn brain activity into typed sentences without opening your skull. The leap is real. So is the catch: the system learns from typing, the one thing its intended users cannot do.

On Monday, Meta unveiled the second version of Brain2Qwerty, a system that reads the brain signals people produce while typing and reconstructs the words. It is non-invasive. There is no surgery and no implant. A volunteer wears a magnetoencephalography (MEG) scanner, a helmet-like machine that picks up the tiny magnetic fields the brain gives off. An AI pipeline does the rest.

The headline number is a real jump. Brain2Qwerty v2 hit an average word accuracy of 61 per cent, rising to 78 per cent for the best participant, Meta said. Earlier non-invasive systems managed only single digits. Last year’s v1 topped out around 48 per cent.

To get there, Meta trained the system on...

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