How fast can a brain-computer interface type?

A brain-computer interface (BCI) can decode speech into text at roughly 56 to 78 words per minute in the published studies so far ^{1 2}. Those figures come from a few people with paralysis who had electrodes implanted in the brain, and they describe what is possible in research, not a typing device anyone can buy. Our guide to the future of typing puts these speeds next to keyboard and voice figures.

The published speeds cluster between 56 and 78 words per minute

Three studies give the clearest numbers. In 2023, a lab study decoded one participant's attempted speech at 62 words per minute, with a 23.8 percent word error rate on a 125,000-word vocabulary ³. A second 2023 study decoded attempted speech from a woman who could not speak or type at a median of 78 words per minute, with a median word error rate of 25 percent ². The participant could not speak or make speech sounds, and could not type, because of weakness in the muscles she needed ⁴.

A 2026 study reports that the participant used a speech and cursor device at home for more than 3,800 hours, with no researchers present ⁵. He communicated at an average of 56 words per minute over almost two years ¹. The study reports results from one participant, a man with paralysis and severe dysarthria due to ALS ⁶.

Speeds differ across studies because tasks differ. Some are copy tasks, some are free communication, and error rates are not always counted the same way. Compare them with care.

The 2026 home speed is close to an average typist, and far below the fastest

The average typist in a large online test reached 51.56 words per minute ⁷. The 2026 home average is about 9 percent above that figure ⁸, so the home average is in the range of an average keyboard user, though the two come from different samples. The fastest typists in the same online test reached 120 words per minute or more ⁹, which no measured BCI in these studies has matched.

Speech on a phone is faster still. In a controlled study on an iPhone, English speech input reached 153 words per minute ¹⁰. That is about 2.7 times the 2026 home average of the BCI ¹¹. The phone study used short phrases in a quiet room, so it is not a fair match for a clinical study either. It shows the gap in speed, not the ceiling for each.

Cursor control is slower than decoding speech

Not every BCI route to text is speech decoding. In the 2024 BrainGate study, the participant typed with a gyroscopic head mouse at 6.3 correct words per minute, with a standard deviation of 1.3 ¹². Decoding speech is therefore the faster route to text in these studies, and it is the route behind the 56 to 78 figures.

Non-invasive brain typing is still at an early stage

Not every BCI needs surgery. A 2025 preprint tested a decoder that reads brain signals while healthy volunteers typed, using 35 volunteers ¹³. Its average character error rate was 32 percent with magnetoencephalography (MEG) recordings ¹⁴, and 67 percent with electroencephalography (EEG) ¹⁵. These are error rates per character, not speeds, so they cannot be read as words per minute. They show that the non-invasive route is still at an early stage.

It depends on the person, the device and the task

Voice quality is another test. A 2025 study turned neural activity into a synthesized voice that was often intelligible, though not consistently ¹⁶. For a person who cannot speak, that can still matter a great deal, but it is not yet a substitute for everyday conversation.

What this means for you

If you can speak, a BCI is not a faster route than speaking into a phone, which reached 153 words per minute in a controlled test ¹⁰, and it is not available to you outside research. If you cannot speak or type, the BCI results show what may come, but the devices in these studies are research tools, and assistive technology you can use today is the practical choice. The guide on speech recognition for speech impairments covers the options that exist now.

To see whether the gap between speech and typing matters for your own work, read will voice replace keyboards, and for the silent route, read what is silent speech. The words per minute entry explains how speed is counted, and the word error rate entry explains the accuracy figures.