Ethereum successfully activated the Glamsterdam upgrade on the Sepolia testnet on October 6, 2026, at epoch 353,024. Prior to activation, developers released an emergency Prysm software update to enhance gas limits and ensure network stability. The upgrade introduces proposer-builder separation (PBS) and gas pricing changes designed to improve overall network efficiency. As a key testnet, Sepolia serves as one of the final major rehearsals before the upgrade's deployment on the Ethereum mainnet.
The successful testnet activation marks a key milestone for network efficiency, introducing proposer-builder separation and gas pricing adjustments ahead of mainnet launch.
Read the full storyEthereum developers activated the Glamsterdam upgrade on the Sepolia testnet following an emergency software patch, marking a key milestone before the mainnet launch.
