Ethereum’s next upgrade has a test date—not a mainnet launch date. The Ethereum Glamsterdam upgrade is scheduled to activate on the Hoodi testnet on October 26, 2026, at 17:42:48 UTC. The Ethereum Foundation says the same activation will raise Hoodi’s block gas limit to 200 million, while the timing for Ethereum mainnet remains undecided.
That distinction matters. A testnet milestone gives developers and validators a place to check new rules before they reach the network that handles real ETH. It does not mean Ethereum’s live network is changing on October 26, or that everyday holders need to move their coins.
The schedule comes from the Ethereum Foundation’s October 16 announcement. Here is what the Glamsterdam Hoodi test means, what it changes, and what remains unconfirmed.
The dates that matter
- Sepolia: Glamsterdam activated on October 6, according to the Foundation.
- Hoodi: Activation is scheduled for October 26 at 17:42:48 UTC, at epoch 132,352 and slot 4,235,264.
- Mainnet: No activation date has been decided.
Hoodi is a testing network, not Ethereum mainnet. The 200 million gas limit in this announcement applies to Hoodi. Reading it as an immediate increase in live Ethereum capacity would get ahead of the evidence.
What Glamsterdam is trying to change
Glamsterdam brings together two parts of Ethereum’s upgrade work: Amsterdam on the execution layer, where transactions are processed, and Gloas on the consensus layer, which coordinates agreement on the chain.
The Foundation highlights two changes designed to make greater layer-1 throughput more practical: enshrined proposer-builder separation, usually shortened to ePBS, and block-level access lists, or BALs.
ePBS: putting the builder–proposer exchange into the protocol
Building a block and proposing it to the network are different jobs. Under EIP-7732, the proposer first includes a builder’s commitment to an execution payload; the builder then reveals that payload. The protocol handles payment to the proposer.
The practical goal is to reduce reliance on trusted middleware for that exchange. The change also separates consensus validation from execution validation, giving validators more time to check the transactions in a payload. That is infrastructure work—not a promise that every transaction becomes instantly cheaper.
Block-level access lists: a clearer map of what a block touches
A block can access many accounts and storage locations. EIP-7928 introduces enforced lists recording those accesses and post-transaction state changes.
Those lists let clients read state from disk in parallel, validate transactions in parallel and calculate state roots more efficiently, according to the Foundation. In plain English, they give software more information to organize the checking work instead of treating everything as one long queue.
Why 200 million gas does not mean guaranteed low fees
Gas measures computational work on Ethereum; it is not a dollar amount. A higher block gas limit changes how much gas a block can accommodate, but it does not set the price users pay for that gas.
Glamsterdam also changes how resource use is charged. The Foundation says state creation will become more expensive and separately metered, while state-access costs will change too. Developers therefore need to test actual contracts and gas estimates rather than assume every operation gets cheaper.
For readers watching ETH, this announcement establishes a technical testing milestone. It does not establish a price target or prove that a market rally will follow.
Who needs to act—and who does not?
Hoodi node operators and stakers need compatible execution- and consensus-layer clients before activation. Stakers should also make sure both the beacon node and validator client are updated, and review any changed builder or validator duties. The Foundation’s announcement contains the client release tables and upgrade guidance.
Application developers should test contracts and gas estimation against the new rules. The Foundation specifically flags contracts with fixed gas stipends, hardcoded gas limits or assumptions about remaining gas as areas that may need attention.
Mainnet users and ETH holders do not need to do anything because of this Hoodi announcement. Mainnet operators also have no action required as a result of this testnet notice. A separate announcement will cover the mainnet upgrade.
What to watch next
The next checkpoint is Hoodi’s scheduled activation and how clients, validators and applications behave under the new rules. After that, watch for a separate, explicit mainnet announcement—not a date inferred from a testnet headline.
The takeaway is straightforward: Ethereum has put another Glamsterdam test on the calendar. The live-network launch is still an open question.
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Quick answers
When is the Glamsterdam Hoodi upgrade?
It is scheduled for October 26, 2026, at 17:42:48 UTC, at epoch 132,352 and slot 4,235,264.
Is Ethereum mainnet upgrading on October 26?
No mainnet activation has been scheduled in this announcement. October 26 is the Hoodi testnet date; mainnet timing remains undecided.
Do ETH holders need to swap tokens or move funds?
No. The Foundation says mainnet users and ETH holders do not need to act because of this Hoodi announcement.
Will Glamsterdam guarantee lower fees?
No. This announcement concerns testnet changes, including gas repricing. It does not guarantee lower mainnet transaction fees.
This article is for information, not investment advice. Featured image: AI-generated editorial illustration; not a photograph of a live network event.
