Magic-state cultivation: Google's Willow claim

status: open, opened 2026-10-16, last moved 2026-10-15. AI social google research

• 2026-10-15 (~2:45 PM ET, Pichai post relayed by Demis Hassabis — https://x.com/demishassabis/status/2110928622399914403): team claims first magic-state cultivation on physical hardware, a 40x error reduction versus previous methods and 99.99% logical fidelity on the Willow processor, published in Science the same day. Company-announced via social; the Science paper is the verifiable anchor. Watch: independent reading of the published fidelity numbers, and whether a utility timeline is ever stated.