DARPA launches O-Circuit program — Organoid BCI using living brain tissue for AI computation and neural interface research
Summary
DARPA launched the O-Circuit (Organoid Cytomorphic Intelligence Resulting from Convergent Understanding and Information Transfer) program in early 2026, with a Proposers' Workshop held on April 10, 2026. O-Circuit funds research into using neural organoids — living brain tissue grown in vitro — as computational substrates for AI processing, neural interface development, and biological computing. The program represents DARPA's bet that organoid-based computation (sometimes called "wetware") could offer advantages in energy efficiency, learning capability, and biocompatibility compared to silicon-based computing for neural interface applications. The O-Circuit announcement follows the DARPA-funded 28bio organoid seizure prediction validation and represents DARPA's broader investment in organoid technology for defense and neuroscience applications.
Why it matters
DARPA funding O-Circuit organoid BCI computation is one of the most unconventional neurotech bets in the history of the field. Organoids as computing substrates — not just drug testing platforms — positions living brain tissue as a potential component of future neural interfaces and AI systems. If biological organoid computation demonstrates advantages in learning speed, energy efficiency, or biocompatibility, it could reshape the long-term trajectory of both BCI hardware and AI chip design.
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