ETH Upgrade Countdown Begins: 24 Hours Left for Glamsterdam Testnet Launch

Key Summary

Ethereum's Glamsterdam upgrade is set to launch on Sepolia's testnet on October 6, 2026, at 13:53:36 UTC, marking the final step before its mainnet activation. The upgrade combines Amsterdam and Gloas upgrades, introducing enshrined proposer-builder separation and block-level access lists to enhance L1 throughput. Non-staking node operators are urged to update their clients, while stakers must update both their beacon node and validator client. Glamsterdam's changes include EIP-7732, EIP-7928, and adjustments to gas accounting, state-access costs, and contract sizes. The upgrade aims to provide a foundation for scaling execution capacity while keeping block validation practical for node operators.