We're excited to announce Metal L2's upcoming Upgrade 14, featuring two major enhancements: MT-Cannon and a new Operator Fee structure. MT-Cannon significantly advances our fault proof capabilities by upgrading to the MIPS-64 architecture and enabling multi-threaded processing. This shift removes previous memory limitations, dramatically expanding the efficiency and robustness of fault proofs.

In addition to MT-Cannon, Upgrade 14 introduces the Operator Fee mechanism, designed to improve accuracy and flexibility in fee calculations. This foundational improvement addresses the challenges associated with accurately pricing user fees, particularly as we explore advanced technologies like ZK proving and custom gas tokens in future upgrades.

The upgrade is scheduled to be executed on the Metal L2 Mainnet on April 25th, 2025. For a comprehensive overview and detailed information, please refer to the full upgrade page on Optimism.