Ethereum’s Glamsterdam completes Devnet-11 rehearsal with proposed block gas cap raised to 200 million

Ethereum’s planned Glamsterdam upgrade completed a rehearsal on Devnet-11 this week, where blocks were successfully confirmed under a new block-building rule set. The proposal would raise the block gas limit from 60 million to 200 million and add block-level access lists, a change designed to let nodes fetch data in parallel and validate unrelated transactions at the same time. The tradeoff is longer block data propagation, which is expected to increase from about 2 seconds to 9 seconds to accommodate larger blocks. In testing, the Nethermind execution client passed all 2,302 performance tests and processed 570.7 billion gas in 3 minutes and 15 seconds. Developers are targeting a Sepolia testnet deployment on Oct. 6, though the exact timing has not been finalized. The 200 million gas ceiling remains experimental and has not yet gone through adversarial stress testing.