Living Brain Organoids Are Emerging as the Next Frontier in Computing

Human brain organoids—clusters of a few million neurons derived from skin or blood cells—are being kept at body temperature for months, developing brain-wave patterns akin to premature infants. Labs worldwide use them to model disease, test toxins, and now to guide robots or play video games, with projects at UC San Diego, Johns Hopkins and a Melbourne startup. Cortical Labs’ CL-1 platform houses up to a million neurons for six months, allowing remote users to send electrical signals and even train the tissue to improve at Pong and Doom.

Proponents argue that living neural networks could offer self-repairing, low-power alternatives to silicon AI, while critics warn that growing organoids larger than a bee’s brain raises unanswered sentience and welfare concerns. Funding is rising, exemplified by an NIH $87 million grant for standardized organoid modeling, and the field is being branded “organoid intelligence” to attract investment. Nonetheless, most researchers focus on practical applications—such as more predictive drug screening—rather than philosophical debates about consciousness.