Anthropic's Mythos AI found a critical flaw in HAWK, and the algorithm was pulled from the NIST standards race

HAWK, a post-quantum digital signature candidate, had cleared NIST's first two rounds. Anthropic's Mythos model, run under human guidance, spent roughly 60 hours and $100,000 of compute developing a new attack on the Lattice Isomorphism Problem that halved the algorithm's key strength. The weakness could be closed by doubling the key size, but that left HAWK sluggish next to rivals such as ML-DSA and FN-DSA, so its developer withdrew it from consideration.