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Ethereum & L2s · 1 min read

Ethereum Schedules Glamsterdam Upgrade on Hoodi Testnet for Oct. 26

The testnet deployment follows Sepolia activation and introduces enshrined proposer-builder separation and block-level access lists alongside a 200M gas limit.

Editorial oversight: Julian Mercer, Chief Editor
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$ETH $2,407 −1.9%

At a glance Announced

What happened
The Ethereum Foundation scheduled the Glamsterdam network upgrade for activation on the Hoodi testnet on Oct. 26, 2026.
Why it matters
The upgrade deploys enshrined proposer-builder separation and block-level access lists while raising the testnet gas limit to 200M.
Who is affected
Hoodi node operators, stakers, and smart contract developers using the testnet.
Takes effect
2026-10-26
What's next
Activation on Hoodi at epoch 132,352 on Oct. 26, 2026, at 17:42:48 UTC.
Primary source
Ethereum Foundation Blog: Glamsterdam Hoodi Testnet Announcement

Key points

  • Glamsterdam activates on the Hoodi testnet at epoch 132,352 on Oct. 26, 2026, raising its gas limit to 200M 1.
  • The upgrade incorporates enshrined proposer-builder separation under EIP-7732 and block-level access lists under EIP-7928 1.
  • State creation and state access costs are repriced under EIP-8037 and EIP-8038, altering smart contract gas accounting 1.

The Ethereum Foundation announced on Oct. 16 that the Glamsterdam network upgrade is scheduled to activate on the Hoodi testnet at epoch 132,352 on Oct. 26, 2026, at 17:42:48 UTC 1. The upgrade follows its earlier deployment on the Sepolia testnet on Oct. 6 1. Along with the transition, Hoodi's gas limit will expand to 200M at the activation epoch 1. Mainnet activation remains unscheduled pending further testing 1.

Glamsterdam bundles consensus layer improvements from Gloas with execution layer updates from Amsterdam 1. Its central architectural change is enshrined proposer-builder separation (ePBS) via EIP-7732, which integrates proposer-builder division directly into consensus rules 1. Under this standard, proposers accept builder payload commitments while the protocol manages payments, curtailing reliance on third-party middleware and enabling a payload timeliness committee to oversee payload and blob data availability 1. The upgrade also introduces block-level access lists through EIP-7928 to record touched storage locations, allowing nodes to process transactions and read state in parallel 1.

Gas Repricing and Protocol Alterations

The upgrade reconfigures state accounting across several Ethereum Improvement Proposals 1. EIP-8037 raises and meters state creation fees, while EIP-8038 adjusts state-access costs 1. Other specifications revise intrinsic gas under EIP-2780, introduce an ETH transfer log mechanism through EIP-7708, lift the contract size ceiling via EIP-7954, and increase churn limits for validator exits and consolidations under EIP-8061 1. Developers must update contracts that depend on hardcoded gas stipends or fixed limits 1.

Node operators and stakers on Hoodi must upgrade both their execution and consensus layer clients prior to the activation epoch 1. Client teams have started releasing compatible builds, including Lodestar 1.50.0, Nimbus 26.10.1, Teku 26.10.1, Besu 26.10.0, and Nethermind 2.2.0 1. Mainnet operators and $ETH holders require no action until core developers confirm the production deployment schedule 1. At the time of writing, $ETH traded at $2,402, down 1.9% over the past 24 hours.

Questions this story raises

What is the Glamsterdam upgrade?
Glamsterdam combines the Amsterdam execution layer upgrade with the Gloas consensus layer upgrade, featuring enshrined proposer-builder separation (ePBS) and block-level access lists (BALs) to expand Layer-1 capacity [1].
When does Hoodi activate the upgrade?
Activation is set for epoch 132,352, slot 4,235,264, occurring on Oct. 26, 2026, at 17:42:48 UTC [1].
Do Ethereum mainnet users or ETH holders need to take action?
No. The announcement applies strictly to the Hoodi testnet, and mainnet activation details will be determined and shared at a later date [1].

Sources

  1. [1] Glamsterdam Hoodi Testnet Announcement — Ethereum Foundation Blog, October 16, 2026

Written by Basis Desk's newsroom system from the primary sources above and machine-verified against them before publication. Market figures marked "at the time of writing" come from live exchange data. Report an error: corrections@basisdesk.news · corrections policy.

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