Ethereum: Glamsterdam Testnet Upgrade Activates on Sepolia with 200M Gas Limit Signal - 06 Oct 2026

Ethereum's Glamsterdam upgrade activates on the Sepolia public testnet at 13:53 UTC, with testnet operators asked to upgrade their clients by October 5. The fork will signal a 200M gas limit, rising gradually from 60M through block-by-block voting.The activation gives the scaling roadmap a dated checkpoint. Glamsterdam is Ethereum's next hard fork, and its Sepolia run tests the fork mechanics and the higher gas limit in a public environment. The gradual rise from 60M to 200M via block-by-block voting lets validators adjust capacity rather than switch at once, which reduces the risk of stalled blocks or client strain during the transition. For observers tracking throughput progress, the testnet date confirms the upgrade is advancing on schedule.The September all-Protocol update is out. Glamsterdam heads to Sepolia on Oct 6, both Hegotá headliners are on devnets, and the PQ roadmap is taking concrete shape. Plus faster block propagation and autoresearch. Highlights in the thread below. 👇