Ethereum developers schedule Glamsterdam on Sepolia for Oct. 6

Ethereum developers have scheduled the Glamsterdam upgrade to activate on the Sepolia testnet on Oct. 6. The Ethereum Foundation said Sepolia node operators must update their execution-layer and consensus-layer clients before activation. Glamsterdam will move the handoff between specialized block builders and validators into Ethereum's protocol, reducing reliance on outside middleware. The upgrade will introduce block-level access lists that record accounts and storage locations used during each block. It will change gas pricing to better reflect the cost of creating and accessing data on Ethereum. The foundation said contracts with fixed gas stipends or hardcoded gas limits may require changes. Developers have not set dates for the upgrade on the validator-focused Hoodi testnet or mainnet. Developers are targeting 2027 for Hegotá, the upgrade expected to follow Glamsterdam. Ethereum co-founder Vitalik Buterin said Hegotá could be the network's last "normal" fork before development shifts toward recursive STARKs, automated formal verification, optimized consensus and quantum-safe cryptography.