The Ethereum Foundation announced that the Glamsterdam upgrade will activate on the Hoodi testnet on October 26 at 17:42 UTC, raising its block gas limit to 200 million, matching Sepolia. The upgrade introduces enshrined proposer-builder separation (ePBS) and block-level access lists (BALs) to enable parallel transaction validation and improve Ethereum Layer 1 throughput, alongside revised gas pricing for state creation and data access.