Ethereum Glamsterdam Upgrade Goes Live on Sepolia
Ethereum’s Glamsterdam upgrade went live on the Sepolia public testnet on 6 October 2026 at 13:53 UTC, marking a major step towards Ethereum’s planned 2026 scaling package and eventual mainnet activation.
The Glamsterdam test includes a 200 million gas limit, up from roughly 60 million. The test will help developers assess whether validators, execution clients and consensus clients can process larger blocks without creating excessive hardware, bandwidth or reliability demands. The higher limit could increase transaction capacity, but it does not guarantee lower Ethereum fees.
The upgrade also introduces enshrined proposer-builder separation through EIP-7732 and block-level access lists through EIP-7928. These changes are designed to separate block construction from validation and support parallel execution, allowing clients to process eligible transactions and state data more efficiently. EIP-8037 also changes gas accounting for state creation, which could require updates to wallets, gas estimators and other infrastructure.
Developers will review Sepolia’s performance before scheduling the next Hoodi testnet activation. No Ethereum mainnet date has been confirmed. After Glamsterdam, development is expected to shift towards the Hegotá upgrade, which may include account abstraction, privacy, censorship resistance and further Layer 1 scaling features.
Neutral
The immediate market impact is likely neutral because Glamsterdam is still in the public testing phase and no Ethereum mainnet activation date has been set. The upgrade is technically positive for Ethereum’s long-term fundamentals: a 200 million gas limit could support greater Layer 1 capacity, while proposer-builder separation and block-level access lists may improve validator efficiency and enable parallel execution.
However, traders are unlikely to price in the full benefits until Sepolia and the later Hoodi deployment demonstrate stable performance. A higher gas limit also increases execution and hardware demands. Any client failures, validator issues or delays could create short-term selling pressure for ETH. Changes to gas accounting may also cause temporary uncertainty for wallets, applications and infrastructure providers.
Similar Ethereum testnet launches and hard-fork preparations have generally produced limited and short-lived price reactions compared with mainnet activations, fee trends, network usage and broader market liquidity. In the short term, ETH is more likely to remain driven by Bitcoin direction, derivatives positioning and macroeconomic conditions. In the long term, successful testing could strengthen the Ethereum scaling narrative and support ETH sentiment, while delays or technical problems would weaken it.