Anthropic says Claude Mythos 5 designed quantum circuits that outperform published methods, cutting gate requirements by up to 17×

Anthropic researchers gave Claude Mythos 5 plain-language specifications for eight quantum circuits spanning chemistry, optimization, physics simulation, and number theory, plus an automated evaluator scoring qubit and gate counts. Working in a closed loop with minimal human input, Claude produced designs beating the best published circuits, in some cases by an order of magnitude or more, by finding new mathematical insights rather than fine-tuning. One result cut the costliest step of a leading quantum optimization algorithm about 12x. The work, led by Andi Gu, suggests practical quantum computers could arrive sooner than anticipated.

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