Anthropic says Claude designed quantum circuits better than the best published ones

Anthropic published "Designing more efficient quantum circuits with Claude" on Oct 16, 2026. Per its summary, it gave Claude plain-language specifications for eight quantum circuits, plus an automated evaluator to check and score the designs. Anthropic says Claude, working largely on its own, improved on the best published circuits, in some cases by an order of magnitude or more. The results are Anthropic's own claim and have not been independently checked.