Claude Mythos 5 Beats Most Efficient Quantum Circuits on 7 of 8 Tasks

Anthropic's Claude Mythos 5 improved quantum circuit efficiency by an order of magnitude or more on seven of eight tested tasks, using a closed-loop system with an independent evaluator to refine designs without human intervention. The collaboration with Harvard and other researchers used the OpenEvolve tool to optimize circuits for chemistry, materials science, and number theory applications, including developing the first reversible implementation of divsteps. These efficiencies reduce hardware resources needed for quantum algorithms.