The Ethereum Foundation said the Glamsterdam upgrade has reached a set of finalized technical milestones and is now running on multi-client devnets, moving the network closer to a first-half 2026 deployment. The upgrade centers on a 200 million gas-limit floor, broader transaction propagation and targeted gas repricing, all aimed at improving throughput, pricing transparency and transaction execution.
The changes matter because they address clear user-experience bottlenecks. Larger block capacity, more explicit state-cost pricing and better parallelization tools could make transaction confirmation, fee estimation and pending-state visibility easier to manage across Ethereum applications.
Glamsterdam Targets Capacity, Pricing and Propagation
One of the upgrade’s core changes is Enshrined Proposer-Builder Separation, or ePBS, which has stabilized on devnets. By extending the transaction propagation window from about 2 seconds to roughly 9 seconds, builders gain more time to assemble larger execution payloads without depending as heavily on off-protocol relay infrastructure.
That wider window changes operational timing for wallets, relayers and transaction-routing systems. Submission logic, retry behavior and builder pipeline compatibility will need to reflect a longer propagation cycle that supports larger blocks while preserving predictable confirmation flows for users.
EIP-8037 introduces a fixed cost_per_state_byte model and has already produced full repricing figures on testnets. The proposal makes state growth more directly visible in transaction pricing, reducing the need for ad-hoc client workarounds that can obscure the real cost of long-term storage.
That change gives wallets and interfaces a clearer basis for gas estimation. Instead of treating storage growth as an opaque backend concern, product teams can surface more transparent fee signals tied to created state, improving user understanding of why certain transactions cost more.
Parallel Execution Becomes a UX Priority
Block-Level Access Lists, or EIP-7928, are designed to reduce sequential processing bottlenecks by giving clients upfront dependency maps for transactions. For users, more predictable execution ordering can reduce confusing pending states, especially when multiple transactions are batched or processed in parallel.
The upgrade also includes potential base-cost reductions. EIP-2780 could cut intrinsic gas for simple ETH transfers by up to 71%, making standard transfers and smaller-value payments cheaper to execute if the change performs as expected in production.
Together, BALs and ePBS create a cleaner framework for parallel execution and MEV handling. That combination matters because fairness, transaction ordering and execution predictability are increasingly central to both wallet UX and professional infrastructure design.
The Protocol cluster also saw leadership changes around May 11–12, 2026. Will Corcoran was appointed research coordinator, Kev Wedderburn will lead zkEVM efforts, and Fredrik will head Protocol Security, giving Glamsterdam and the later Hegotá effort clearer coordination ownership after earlier team departures and a sabbatical.
The reshuffle follows the Protocol team’s delivery of the Fusaka upgrade in December 2025. With Glamsterdam now moving from exploratory prototyping into integration and hardening, the new leadership structure becomes part of Ethereum’s execution-readiness process.
Wallets, relayers and infrastructure providers should now prioritize compatibility testing with ePBS builder pipelines, revised gas-estimation logic and transaction flows affected by parallel execution. The practical goal is lower friction in confirmations, retries and fee transparency as Glamsterdam moves toward deployment.