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Basis Desk

Story thread · 2 updates · September 29, 2026 → September 29, 2026

Ethereum Schedules Glamsterdam Upgrade Across Testnets

Where things stand · updated 4h ago

Ethereum core developers are advancing the Glamsterdam hard fork across test environments before deploying the changes to mainnet.

The initiative merges the Amsterdam and Gloas updates into a single network upgrade. Core features include enshrined proposer-builder separation (ePBS) and block-level access lists, which target Layer 1 execution scaling.

Testing begins on the Sepolia network on Oct. 6, marking the initial live trial for the consensus and execution layer adjustments. Successful activation on Sepolia serves as the prerequisite for deployment on the Hoodi testnet, which precedes the eventual mainnet launch.

Timeline

  1. Ethereum Schedules Glamsterdam Upgrade for Sepolia Testnet on October 6

    The upcoming upgrade combines the Amsterdam and Gloas updates, introducing enshrined proposer-builder separation and block-level access lists to scale Layer 1 execution.

  2. Ethereum Schedules Glamsterdam Upgrade for Sepolia Activation on Oct. 6

    The testnet hard fork introduces enshrined proposer-builder separation and block-level access lists ahead of Hoodi and mainnet rollouts.

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