An open coding contest has reduced the estimated GPU cost for a quantum-safe Bitcoin spend from approximately $320 to $66 in just one week, according to StarkWare and the contest's live dashboard. The rapid optimization demonstrates significant progress in making post-quantum cryptography more computationally efficient for Bitcoin transactions. StarkWare emphasizes that the $66 figure represents a current estimate rather than a fixed price. The initiative highlights how collaborative development can accelerate the practical implementation of quantum-resistant security measures within the Bitcoin ecosystem.