Ethereum core developers have entered the final sprint phase for the next major network upgrade, Glamsterdam. All teams have begun comprehensive testing of the fork version containing all planned Ethereum Improvement Proposals (EIPs) within closed developer networks (devnets). This is the last development stage before the codebase is frozen and deployed to public testnets. Parithosh Jayanthi, DevOps engineer and core developer at the Ethereum Foundation, stated that although an exact activation timeline has not yet been finalized, tremendous progress has been made, and the upgrade is expected to launch on mainnet in the second half of 2026.