The dust has barely settled on the Fusaka hard fork, but in the world of Ethereum, there is no downtime. With Fusaka successfully scaling data availability for Rollups via PeerDAS, the developer community is now turning its eyes to the next major milestone on the roadmap: Glamsterdam.

Scheduled for the first half of 2026, Glamsterdam is a complete structural overhaul aimed at solving two of Ethereum’s oldest problems: Centralization and State Bloat.

Here is everything you need to know about the upgrade that will define Ethereum in 2026. 👇

What is the Ethereum Glamsterdam Uprade?

Glamsterdam is Ethereum’s next coordinated hard fork, formed by combining the star name Gloas for the Consensus Layer with Amsterdam for the Execution Layer. Together, they represent a single upgrade focused on strengthening the protocol’s core architecture rather than introducing surface-level features.

As part of Ethereum’s long-term roadmap, Glamsterdam aligns with the Surge, the era dedicated to scalable throughput and rollup-centric design. Its purpose is to finalize much of the Surge’s foundational work by refining how blocks are built, processed, and validated at the deepest protocol layers.

The upgrade is conceptually defined by three ambitions: making block production more trustless, enabling more parallelized block execution, and improving gas and state economics so Ethereum can support massive rollup-driven activity without straining node operators or weakening decentralization.

Glamsterdam’s role in the Surge is shifting Ethereum from simply expanding data capacity to ensuring long-term resilience. It reduces validator dependence on external MEV infrastructure, limits state bloat, and prepares the base layer for sustained high-throughput demand across global rollups.

Key Benefits of the Glamsterdam Uprade

Glamsterdam strengthens Ethereum’s core architecture by improving block production trustlessness, execution efficiency, and long-term scalability.

Key benefits delivered through its structural improvements:

• Trustless Block Production: Introduces protocol-level separation between proposers and builders, reducing reliance on centralized relays and improving censorship resistance.
• Enhanced EVM Predictability: Gas and storage repricing improves how the EVM models resource usage, giving smart contracts more consistent and predictable execution behavior.
• Higher Execution Efficiency: Block-Level Access Lists enable parallel verification and faster state reconstruction, significantly reducing node workload as on-chain activity scales.
• Sustainable State Growth: Revised gas and storage pricing better reflect real resource consumption, discouraging unnecessary state expansion and improving long-term network health.
• Rollup-Ready Throughput: Optimized block processing and reduced execution overhead allow Ethereum to accommodate exponentially increasing rollup transactions.
• Stronger Validator Reliability: Architectural changes minimize dependency on off-chain MEV infrastructure, lowering operational risk and improving consistency across the global validator set.
• Improved Layer 2 Settlement Reliability: More deterministic block execution and clearer L1 cost structures help Layer 2 networks submit batches and proofs with greater stability.

Ethereum Glamsterdam Release Date

Glamsterdam targets a 2026 mainnet activation, but its schedule remains flexible because core components require extensive testing, cross-client coordination, and security review.

Key timing signals from public development milestones:

• Post-Fusaka Positioning: Developers consistently frame Glamsterdam as the upgrade following Fusaka, activating only after its stability and ecosystem readiness are confirmed.
• Headliner Freeze Milestone: Core teams anchored scope by selecting two headliners in 2025, signaling intention to avoid delays from excessive EIP expansion.
• Devnet Progression: Early ePBS and BALs devnets scheduled around late-2025 indicate substantial engineering readiness but still demand months of refinement.
• Testnet Windows: Public testnets and dual audit phases outlined for early-to-mid 2026 create the earliest realistic path toward safe activation.
• Tentative Target: Community documentation references a June 2026 goal, though developers stress this remains aspirational pending validation of critical components.

Glamsterdam Key Features

Glamsterdam introduces deep architectural changes designed to harden Ethereum’s MEV ecosystem, accelerate block processing, and align gas and state costs with real resource demands, forming the backbone of the Surge’s long-term scalability vision.

1. Enshrined Proposer-Builder Separation (ePBS)

ePBS moves proposer-builder separation into the protocol, replacing today’s off-chain relay infrastructure with an in-protocol commit-reveal flow. This reduces reliance on trusted intermediaries, standardizes MEV handoff rules, and enforces builder commitments directly at the consensus layer.

The design introduces explicit deadlines, payload commitments, and fallback behavior, allowing the protocol to handle builder non-delivery without halting liveness. It also provides a structured foundation for future mechanisms like protocol-level inclusion lists and verifiable pre-confirmations.

2. Block-Level Access Lists (BALs)

BALs add a block-level record of all accessed accounts and storage keys, enabling clients to validate blocks using deterministic access maps instead of dynamic discovery. This reduces disk lookup variance, improves execution parallelizability, and supports predictable block verification cost modeling.

The recorded access list also allows “executionless” state reconstruction, where nodes update state using provided diffs without re-executing transactions. This lowers synchronization overhead, reduces dependency on execution-heavy replay, and makes state growth more manageable.

3. Gas and State Repricing for Scalability

Glamsterdam adjusts gas schedules so operations with high CPU, storage, or bandwidth impact are priced proportionally to their measured resource footprint. This reduces underpriced execution patterns and mitigates several known DoS vectors identified in client benchmarking.

Storage proposals increase costs for contracts with large state footprints, aligning long-term storage growth with verifiable hardware constraints. More accurate pricing also enables safer future increases to data throughput and block-processing concurrency by lowering worst-case execution uncertainty.

Ethereum Glamsterdam EIP List

Glamsterdam’s EIP set clusters around three priorities: 7732 ePBS, 7928 BALs, and a large gas-state repricing package underway.

Most relevant Glamsterdam EIPs, ordered by perceived importance:

• EIP-7732: Enshrined proposer-builder separation moves PBS on-chain, reshaping block production and MEV pipelines, core Glamsterdam headliner (ePBS feature).
• EIP-7928: Block-Level Access Lists enforce per-block state maps, enabling parallel execution and executionless state reconstruction (primary BALs feature).
• EIP-7904: General Repricing adjusts gas costs for opcodes using client benchmarks, anchoring Glamsterdam’s gas-state repricing package (gas/state feature).
• EIP-8011: Multidimensional Gas Metering splits computation, storage, and bandwidth charges into meters, refining resource pricing granularity (gas/state feature).
• EIP-8032: Size-Based Storage Gas Pricing scales storage costs with contract state footprint, targeting long-term state growth (gas/state feature).
• EIP-8037: State Creation Gas Cost Increase raises fees for initializing new storage, discouraging excessive contract proliferation (gas/state feature).
• EIP-8038: State-access gas cost increase raises charges for state reads, aligning pricing with disk lookup overheads (gas/state feature).
• EIP-7805: Fork-choice enforced Inclusion Lists lets validator committees force-include transactions, directly strengthening censorship resistance alongside ePBS (ePBS feature).
• EIP-7872: Max blob flag allows local builders to limit blobs per block, reducing propagation-related reorg risk (ePBS/throughput feature).
• EIP-8045: Exclude slashed validators from proposing by filtering them in proposer selection, robustness in slashing (validator reliability feature).

Many remaining Glamsterdam PFI EIPs tune calldata, memory, access lists, and opcodes, mostly reinforcing the gas-state repricing feature. These complement BALs by tightening execution cost bounds and improving client clarity.

Will Glamsterdam Benefit ETH Investors?

Major Ethereum upgrades consistently serve as high-beta volatility events for investors. Historical data shows ETH often outperforms Bitcoin in the 60 days leading into hard forks. This "buy the rumor" behavior is a reliable, tradable pattern for market participants.

Consider The Merge in September 2022 as a prime example. ETH rallied over 100% from its June lows into the event. However, the price dropped 15% immediately after activation, validating the classic market thesis of selling the news events.

The Shapella upgrade in April 2023 offered a different outcome for traders. Despite fears of a $34 billion sell-side pressure, ETH rallied 10% post-upgrade. The market valued the structural de-risking of the staking withdrawal protocol over the liquidity shock fears.

Glamsterdam likely follows the Dencun Q1 2024 pattern where ETH gained 60% pre-fork. Investors should anticipate a strong Q1 2026 accumulation phase. The structural improvements to censorship resistance provide the fundamental narrative needed to sustain long-term institutional capital inflows.

What are the Risks of the Glamsterdam Upgrade?

Glamsterdam’s architecture reshapes block production, execution, and pricing models, creating new coordination surfaces that must be tested thoroughly across clients and applications.

Key risk categories involved:

• ePBS Free-Option Risk: Builder non-delivery introduces timing asymmetries that affect liveness guarantees and destabilize proposer revenue during volatility.
• MEV Market Concentration: Capital-intensive builders may dominate block construction, structurally reducing competition and weakening decentralization within MEV markets.
• Protocol Complexity Growth: Additional commit-reveal steps and fallback rules broaden consensus surface area, increasing difficulty of cross-client implementation fidelity.
• BALs Correctness Requirements: Deterministic access lists demand strict client agreement; mismatches risk consensus splits during state-access verification.
• Smart Contracts: Gas and storage repricing may change execution costs for existing smart contracts, potentially exposing latent bugs or destabilizing protocols reliant on tightly tuned gas assumptions.
• Execution-Level DoS Patterns: Abnormal access-list structures or pathological transactions may raise worst-case validation time, stressing node performance.
• Gas-Repricing Economic Shifts: Opcode and storage repricing can alter dApp assumptions, revealing underpriced behaviors or introducing unpredictable transaction costs.
• State-Growth Incentive Distortion: Higher storage pressure may redirect developers toward calldata or short-lived patterns, reshaping resource load distribution.
• Validator Operational Adjustment: Removing reliance on MEV relays improves trust assumptions but increases coordination requirements for validator infrastructure.
• Meta-Risk - Overscoping the Fork: Combining major MEV, execution, and gas-economic reforms in one release heightens integration risk and upgrade fragility.

Final Thoughts

Ethereum’s updated Glamsterdam schedule marks a late-stage Surge milestone, where scaling ceases being aspirational and starts looking operational, testnet-driven, and deadline-constrained.

As core devs gradually pivot beyond raw throughput, Ethereum’s narrative shifts toward resilience, MEV structure, and protocol predictability;  subtler themes than earlier “blockspace expansion” cycles.

For investors still waiting on Ethereum’s first clean break above $5,000, Glamsterdam becomes a psychological pivot: from if Ethereum scales, to how well that scaling holds under real market pressure.