Ethereum Glamsterdam Devnet Is Live — and This One Matters
Something significant is happening inside the world's most-used smart contract blockchain. In the final week of April 2026, Ethereum's core development team launched the first generalized devnet for the Glamsterdam upgrade — a milestone that protocol watchers had been tracking for months. The announcement came from nixo.eth, an Ethereum Foundation developer, via a thread on X that circulated widely across the community:
5/6 🧵 Glamsterdam
— nixo.eth 🦇🔊🥐 (@nixorokish) April 22, 2025
▶️ See the Meta EIP here: https://t.co/bt0wRnRO0j
▶️ We'll have a new process beginning in Glamsterdam. See more here: https://t.co/Ce7CiiHmGQ
▶️ An even higher gas limit?!
This is not hype. It is the beginning of the most consequential testing phase Ethereum has entered since the Merge in September 2022.
What Is Glamsterdam — and Why It Changes Ethereum
The name is a portmanteau: "Gloas" (the consensus layer) merged with "Amsterdam" (the execution layer). Together they form Glamsterdam, Ethereum's next hard fork, currently targeting the first half of 2026 — with June as the aspirational deadline.
The upgrade pursues three concrete goals: more reliable block production, parallel transaction execution, and a dramatic reduction in gas fees. The two headline EIPs are EIP-7732 (ePBS — Enshrined Proposer-Builder Separation) and EIP-7928 (Block-Level Access Lists, or BAL).
Today, 80–90% of Ethereum blocks are produced through external relay infrastructure like MEV-Boost — off-chain systems that introduce centralization risk and require trust in third parties. With ePBS, that separation gets enshrined directly in the protocol. No more intermediaries. Block construction becomes transparent, with trustless on-chain payments between builders and proposers.
BALs complete the picture: by declaring in advance every account and storage slot a block will touch, Ethereum can pre-load data from disk and execute non-conflicting transactions in parallel. What is today a sequential, inherently slow process becomes a dependency graph executable across multiple threads simultaneously.
The projected result: 10,000 TPS and a 78% reduction in execution costs. For a DeFi user currently paying $4–8 per swap, that is not a footnote.
For a technical deep-dive into how Ethereum works at the protocol level, read our Ethereum guide.
Generalized Devnet: What It Means in Practice
Until April 2026, testing was split across separate networks: one for ePBS (epbs-devnet) and one for BALs (bals-devnet). The generalized devnet merges everything into a single environment — the first moment all Glamsterdam components coexist and interact. Ethereum Foundation Checkpoint #9, published on April 10, was candid about the pace: development is slow but steady, with ePBS remaining the primary bottleneck given the complexity of coordinating two parties within consensus.
Once the generalized devnet stabilizes, the path is defined: client releases, security audits, public testnets (Holesky and Sepolia), and only then an official mainnet date. June remains possible. Q3 is more realistic. Either way, the direction is unambiguous — and anyone watching only the ETH price is reading the wrong chapter.
Why Institutional Investors Are Pricing In Glamsterdam
Markets have already started moving. On April 14, 2026, ETH broke a bearish channel that had persisted since August 2025, gaining 9.2% in a single session. Analysts cite $3,400 as the next technical target. The ETH/BTC ratio has reached its highest point of 2026. BitMine, the firm associated with analyst Tom Lee, has accumulated over 3 million ETH. The signal is hard to miss: institutional money is beginning to price in the upgrade.
Historical precedent supports the pattern. Before the Dencun upgrade in Q1 2024, ETH gained 60% in the pre-fork window. Before the Shapella upgrade in 2023, it rallied 10% post-activation. Glamsterdam is structurally deeper than either of those upgrades.
For more context on institutional crypto flows, read our analysis of Morgan Stanley's Bitcoin ETF move and Wall Street's entry into crypto.
What to Watch as Glamsterdam Approaches Mainnet
Critics of Ethereum during the 2021–2022 cycle had a point: sky-high fees, opaque MEV, builder centralization, and sluggish execution. Those were legitimate structural complaints. Glamsterdam does not respond with a press release — it responds with code.
The philosophy is enshrinement: pulling into the protocol what previously lived outside it. As Wall Street enters crypto through spot ETFs and federally chartered trust companies, having a Layer 1 with auditable, predetermined block production rules is not a technical nicety for bank compliance teams. It is a prerequisite.
Vitalik Buterin has outlined the post-Glamsterdam roadmap directly: after ePBS, the next priorities are FOCIL (already designated as the headline feature of the following upgrade, Hegotá) and encrypted mempools. The long-term architecture targets a 1000x scalability improvement via ZK-EVM, with Glamsterdam as the foundational layer.
The devnet is live. The mainnet window is open. Watch the Holesky and Sepolia testnet launch dates — those will be the clearest signal that a mainnet date is imminent.
Official Ethereum Foundation video deep-dive:
