Ethereum Glamsterdam Testnet Targets 3x L1 Capacity
Ethereum’s Glamsterdam upgrade activated on the Sepolia testnet on 6 October, with blocks finalizing without major issues. The upgrade includes 18 EIPs and is designed to support a block gas limit of about 200 million, more than three times the current 60 million target. Glamsterdam does not automatically raise capacity: validators must choose to increase the gas limit. Sepolia reached 200 million roughly 11 hours after activation.
Key changes include EIP-7732, which adds protocol-level proposer-builder separation; EIP-7928, which enables block-level access lists for parallel client validation; and EIP-7954, which raises the smart-contract code-size limit from 24 KiB to 64 KiB. Gas costs are also set to change, with new storage slots expected to cost more while standard ETH transfers remain at 21,000 gas. Early tests indicated faster client execution: Geth processed a 40-million-gas block in about 30 milliseconds, down from roughly 115 milliseconds. However, observations covered less than a day and only one node per client.
The next planned deployment is the Hoodi testnet, tentatively scheduled for 27 October; Ethereum mainnet activation remains targeted for the fourth quarter of 2026. For ETH traders, the testnet results point to possible long-term Layer 1 scaling benefits, but they are not yet evidence of a near-term capacity increase or a confirmed mainnet timeline. Validator decisions, further testing and higher costs for storage-heavy activity remain important considerations.
Neutral
The Sepolia activation is a constructive technical signal for Ethereum, with the potential for larger blocks, more efficient validation and higher Layer 1 transaction capacity over time. Those improvements could support ETH demand if they are successfully tested, adopted by validators and delivered on mainnet. However, this is a testnet milestone, not an immediate change to Ethereum’s live capacity. The gas limit increase depends on validator choices, performance observations are preliminary, and mainnet activation is not targeted until the fourth quarter of 2026. Higher costs for creating storage slots could also weigh on some smart-contract activity. Similar upgrade testnet announcements have often had limited direct price effects unless followed by a confirmed mainnet rollout or clear usage growth. As a result, the news is broadly positive for long-term infrastructure prospects but does not provide a strong standalone short-term catalyst for ETH, supporting a neutral price-impact assessment.