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Ethereum\'s Glamsterdam upgrade nears as block size set to triple

Ethereum’s next major upgrade, Glamsterdam, has cleared its first test after being deployed on the Sepolia testnet and finalising blocks without major issues. The upgrade combines the Gloas consensus-layer and Amsterdam execution-layer changes. Researchers say it could expand Ethereum’s layer-1 capacity by at least three times and raise the smart contract size limit from 24KiB to 64KiB. The schedule remains uncertain, with the next testnet step and a 2026 fourth-quarter mainnet target.