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ZEC $1,367 Ethereum Glamsterdam Upgrade Goes Live on Sepolia With More Tests Ahead
Glamsterdam activated on the Sepolia testnet at epoch 353,024, moving Ethereum's scaling upgrade closer to its mainnet launch.
Key takeaways
- Sepolia is live. Glamsterdam activated on Sepolia at epoch 353,024 at 1:53 pm UTC on Tuesday.
- Gas floor set. The Ethereum Foundation set a 200 million gas limit floor, against a current limit of around 60 million.
- Hegotá scoping. Ethereum developers began reviewing 66 proposals for Hegotá in August.
What happened
Ethereum's Glamsterdam upgrade went live on the Sepolia testnet on Tuesday, activating at epoch 353,024 at 1:53 pm UTC, according to Sepolia explorer data reported by Cointelegraph. U.Today had listed the activation for October 6, 2026, around 13:53:36 UTC, at slot 11,296,768. Sepolia is one of the final major rehearsals before the upgrade reaches mainnet.
The Sepolia deployment brings Glamsterdam one step closer to its mainnet activation. Developers will next determine Glamsterdam's activation date on the Hoodi testnet, before setting the final date of its mainnet launch. Ahead of the launch, non-staking Sepolia node operators were urged to update their execution and consensus layer clients to releases supporting the scheduled activation.
Glamsterdam combines the Amsterdam execution layer upgrade with the Gloas consensus layer upgrade. Its headliner changes are enshrined proposer-builder separation (ePBS) and block-level access lists (BALs). EIP-7732 splits block proposers from builders in Ethereum's consensus protocol and separates consensus validation from execution validation, giving validators more time to check execution payloads. EIP-7928 records the accounts and storage locations a block accesses, along with post-transaction state changes.
Why it matters
Glamsterdam aims to advance Ethereum's layer-1 scaling roadmap with ePBS, block-level access lists and gas pricing changes that better reflect the cost of execution, per an Ethereum Foundation blog post. Together, ePBS and BALs provide a foundation for scaling execution capacity while keeping block validation practical for node operators. The foundation set a 200 million gas limit floor, against a current gas limit of around 60 million.
The upgrade also adjusts gas accounting to better reflect resource usage. EIP-8037 increases and separately meters the cost of creating state, while EIP-8038 updates state-access costs. Glamsterdam adds ETH transfer logs, a slot-number opcode, a higher maximum contract size, a deterministic factory contract and new stack-manipulation instructions.
After Glamsterdam's mainnet activation, developers will begin implementing Hegotá as the next major upgrade. In August, Ethereum developers started reviewing 66 proposals to narrow them down as part of scoping Hegotá, with several proposals aimed at bringing more privacy capabilities into the protocol.
What the data shows
- Sepolia activation: epoch 353,024, slot 11,296,768, on October 6, 2026, around 13:53:36 UTC.
- Gas limit: a 200 million floor set for Glamsterdam, against a current gas limit of around 60 million.
- Hegotá scoping: 66 proposals under review in August.
What is still unclear
- Glamsterdam's mainnet activation date is not yet set, developers will determine the Hoodi testnet date first.
- The scope of Hegotá is still being narrowed from 66 proposals, so its final contents are not fixed.
Questions readers ask
When did Glamsterdam go live on Sepolia?
Cointelegraph reported the upgrade went live on Sepolia on Tuesday at 1:53 pm UTC at epoch 353,024, according to the Sepolia explorer. U.Today had listed the activation for October 6, 2026, around 13:53:36 UTC.
What is included in the Glamsterdam upgrade?
Glamsterdam combines the Amsterdam execution layer upgrade with the Gloas consensus layer upgrade. Its headliner changes are ePBS and block-level access lists, alongside gas accounting changes.
What happens after the Sepolia testnet launch?
Developers will determine Glamsterdam's activation date on the Hoodi testnet before determining the final date of its mainnet launch.
Do Sepolia node operators need to update their clients?
Yes. Non-staking Sepolia node operators are urged to update their execution and consensus layer clients to releases that support the scheduled Sepolia activation.
