The Glamsterdam upgrade activated on the Sepolia testnet on October 6, 2026 at 13:53:36 UTC at epoch 353,024, slot 11,296,768.

From the articleEthereum Client Prysm Patches Glamsterdam Test Ahead of 200M Gas Limit IncreaseAlso in Prysm Patch Sets 200M Gas Limit for Ethereum Test, ETH news: Ethereum’s Glamsterdam test gets last-minute fix before major capacity jump, Ethereum Glamsterdam hits Sepolia with 200 million gas limit test, Ethereum Price Prediction: Glamsterdam 200M Gas Test