CryptoSlate
Ethereum will activate Glamsterdam on the Hoodi testnet on Oct. 26, 2026, at 17:42:48 UTC, with a planned 200 million gas target. The date gives node operators a software deadline, while mainnet timing remains undecided. ETH holders and mainnet operators have no action to take from this announcement.
All Hoodi operators must update their execution and consensus clients before activation. Validators must upgrade both beacon nodes and validator clients, then review new duties, builder-tooling compatibility and gas-limit settings. The Foundation lists releases for Besu, Ethrex, Nethermind, Lodestar, Nimbus, Prysm and Teku, while several other clients remain unlisted. Ethrex's listed version is a release candidate.
Why it matters
The 200 million gas figure is a planned block-work budget, not an instantly enforced ceiling. Hoodi's gas-limit schedule sets client defaults and recommendations, but the actual limit adjusts gradually under existing rules and remains subject to operator preferences. Throughput will still depend on transaction complexity, while fees will depend on demand.
Glamsterdam combines Amsterdam changes on the execution layer with Gloas changes on consensus. Enshrined proposer-builder separation moves the proposer-builder exchange into the protocol and gives validators more time to check execution. Block-level access lists record accessed accounts, storage and state changes, allowing clients to perform more work in parallel.
Market impact
The Hoodi test is a technical milestone for Ethereum's scaling roadmap, but it is not a direct catalyst for mainnet ETH flows. Developers must test gas estimation and contracts that rely on fixed stipends, hardcoded limits or remaining-gas assumptions because gas pricing rules are changing.
The next signal is whether operators and applications complete the upgrade smoothly ahead of Oct. 26. A successful test would provide evidence for the roadmap, while mainnet activation still requires separate decisions and testing.
Frequently asked questions
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When will Ethereum activate Glamsterdam on the Hoodi testnet?
Hoodi’s Glamsterdam activation is scheduled for Oct. 26, 2026, at 17:42:48 UTC.
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What does Hoodi’s 200 million gas target mean?
It is a planned budget for computational work per block, not an instantly enforced ceiling. The actual gas limit adjusts gradually under existing rules.
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Do ETH holders need to take action before the Hoodi upgrade?
No. The announcement does not require action from ETH holders or Ethereum mainnet operators. The upgrade requirements apply to Hoodi operators and validators.
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Which software must Hoodi validators upgrade?
Hoodi validators must update both their beacon node and validator client, as well as review new duties, builder-tooling compatibility and gas-limit settings.
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Does the Hoodi test set a date for Ethereum mainnet activation?
No. Mainnet timing remains undecided. The Hoodi deployment is a testnet milestone for evaluating Glamsterdam’s scaling and validation changes.
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