This is the AlphaFold moment for brain-computer interfaces.

Sabi releases the Sabi Cap. The first mass BCI (brain-computer interfaces) may be something you wear, not something surgeons implant.

It is a normal beanie you wear on your head. Inside sit 70,000 to 100,000 tiny custom biosensors that read electrical signals from your brain through your scalp.

They trained a Brain Foundation Model on 100,000 hours of neural data from 100 people.

The model turns your internal speech into text on a computer screen.

You think the words and it types them at about 30 words per minute right now.

You also click, select, or command software purely by intending the action.

“The biggest and baddest application of BCI is if you can talk to your computer by thinking about it,” says Khosla, founder of Khosla Ventures, one of Sabi’s investors. “If you're going to have a billion people use BCI for access to their computers every day, it can't be invasive.”

Sabi’s mind-reading hat uses Electroencephalography, or EEG, which records the brain’s electrical activity through metal discs placed on the scalp.

The downside of traditional wearable system is that its sensors have to detect brain activity through skin and bone, which weakens the signals.
Surgically implanted devices capture much stronger signals because they sit much closer to neurons.

Sabi believes the way to improve accuracy in a wearable is to massively increase the number of sensors. Most Electroencephalography devices use anywhere from 12 to a few 100 sensors. Sabi’s cap is expected to use around 70,000 to 100,000 tiny sensors.