AI Coders Reduce Quantum-Safe Bitcoin Transaction Costs by 79%

Developers using AI tools have dramatically lowered the computational cost of creating quantum‑safe Bitcoin (QSB) transactions. The new method, demonstrated by StarkWare, reduces the estimated GPU compute expense from about $320 to roughly $66.

What Is Quantum‑Safe Bitcoin?

QSB employs hash‑based cryptography to move eligible Bitcoin under existing consensus rules without requiring a protocol change or soft fork. It is designed as a contingency against a future threat where a sufficiently powerful quantum computer could derive private keys from public keys and spend the funds.

StarkWare’s Experiment and the Optimization Challenge

StarkWare mined the first QSB transaction on the Bitcoin mainnet on August 26 using its Slipstream service, consuming roughly 3,100 GPU‑hours and costing an estimated $320 in compute. To address the cost barrier, StarkWare launched the Quantum‑Safe Bitcoin Optimization Challenge on September 16, partnering with Yukon Research and Eigen Labs and offering over $20,000 in prizes.

Participants focused on two bottlenecks: “pinning,” which searches for a valid transaction commitment, and “subset selection,” which finds the correct combination of components. Sixty‑two submissions, many built with AI coding tools, achieved about a six‑fold speed increase on identical hardware.

Performance Gains

Benchmark tests on an RTX 4090 GPU showed pinning speed rising from roughly 146 million verified candidates per second to over 880 million, driving the cost estimate down to about $66‑$67. This figure reflects only GPU compute and does not include network fees or real‑world transaction confirmation costs.

Broader Context of Bitcoin’s Quantum Defense

The challenge aligns with a wider industry effort to prepare for quantum threats. NIST finalized post‑quantum cryptography standards in August 2024 with a 2035 migration deadline for federal agencies, while Google targets 2029 for its own transition. A Google Quantum AI paper published in March 2026 reduced the estimated qubit count needed to break Bitcoin’s cryptography by roughly 20×, shifting some expert timelines to the early 2030s.

Bitcoin developers have also proposed BIP‑360, a quantum‑resistant address format that reached testnet with participation from over 50 miners in March 2026. However, experts such as Stanford cryptographer Dan Boneh caution that a rushed transition could introduce critical bugs before a quantum attack materializes.