The Ethereum Foundation said the Glamsterdam network upgrade will activate on the Sepolia testnet at 21:53:36 Beijing time on October 6, 2026, at epoch 353,024 and slot 11,296,768. According to Foresight News, the activation times for Hoodi and the mainnet have not yet been determined.

The upgrade combines the execution-layer Amsterdam and consensus-layer Gloas, with key changes including built-in proposer-builder separation (ePBS, EIP-7732), which formally brings block proposal and construction into the protocol; block-level access lists (BALs, EIP-7928), which support parallel state reads and transaction validation; and gas pricing adjustments intended to better reflect execution and state growth costs (EIP-8037, EIP-8038, and others).

Node operators are required to update both execution-layer and consensus-layer clients before activation. Related client versions have already been released, and the official announcement includes the detailed compatibility list. Mainnet users and ETH holders do not need to take any action.