Ethereum’s Glamsterdam Upgrade Advances with Sepolia Testnet Launch
Ethereum’s Glamsterdam upgrade has successfully launched on the Sepolia testnet, marking a significant step toward its mainnet activation. The upgrade went live on Tuesday at 1:53 pm UTC, as announced by Ethereum community contributor Pooja Ranjan on X. Glamsterdam is set to advance Ethereum’s layer-1 scaling roadmap with key improvements, including enshrined proposer-builder separation, block-level access lists, and adjustments to gas pricing.
The upgrade aims to enhance Ethereum’s efficiency and scalability, making it one of the most consequential upgrades of 2026. Following the Sepolia testnet launch, developers will determine the activation date for the Hoodi testnet before finalizing the mainnet launch schedule. Glamsterdam is designed to improve transaction throughput and reduce execution costs, supporting higher transactions per second on the Ethereum mainnet.
Two major changes in Glamsterdam are EIP-7732, which introduces enshrined proposer-builder separation to optimize block production and validation, and EIP-7928, which enforces block-level access lists to enable parallel processing and more efficient state root computations. The Ethereum Foundation has also set a 200 million gas limit floor for Glamsterdam, significantly increasing the network’s speed compared to the current gas limit of around 60 million.
After Glamsterdam’s mainnet activation, Ethereum developers will begin working on the next major upgrade, Hegotá, which includes proposals aimed at enhancing privacy capabilities within the protocol.