CLAUDE RAN 53 HOURS WITH NO HUMANS — REDESIGNED 8 QUANTUM CIRCUITS, CUT GATES 17×

According to Anthropic, Claude Mythos 5 redesigned quantum circuits for eight computational primitives and beat the best previously published designs on seven of them, working in a closed loop with an evaluator program that scored qubit and gate counts without human intervention between rounds. On the eighth task, an elliptic-curve point-addition circuit produced in a single 53-hour run, it accepted 12 percent more qubits in exchange for 17 times fewer gates.

The largest headline gain came on a Reed-Solomon decoder for Decoded Quantum Interferometry, where Claude cut the gate count roughly 12 times versus Google's previous construction by switching from the extended Euclidean algorithm to Berlekamp-Massey decoding and empirically pruning the memory budget after running 403 million sample decodings. The work was led by Andi Gu through Anthropic's STEM Fellows Program with Harvard collaborators. All circuits are computationally verified rather than run on physical hardware, so real costs will depend on topology, scheduling, and error-correction overhead.