Analysis · Ethereum & L2s
The major network upgrade introduces enshrined proposer-builder separation and block-level access lists to advance Layer 1 scaling.
Key point 1 of 3
01
The Glamsterdam upgrade activated on the Sepolia testnet on October 6, 2026, at epoch 353,024, combining the Amsterdam and Gloas upgrades.
Key point 2 of 3
02
The upgrade introduces enshrined proposer-builder separation (ePBS) via EIP-7732 and block-level access lists (BALs) via EIP-7928.
Key point 3 of 3
03
Prysm v7.2.1 was released on October 5, 2026, to automate the scheduled 200M gas limit and enable partial data columns by default.
Context
Glamsterdam follows the Fusaka upgrade in Ethereum's multi-year scaling roadmap. It represents a major shift in how blocks are constructed and validated on the network, moving…
Why it matters
Validators and node operators must upgrade their software to maintain network consensus. Smart contract developers must audit their code against new gas pricing rules, as…
What to watch
Core developers will monitor Sepolia's stability before scheduling the upgrade on the Hoodi testnet and eventually the Ethereum mainnet.
Sources
Built from 6 primary sources, machine-checked before publication.
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