Fusaka shipped PeerDAS in addition to a myriad of minor features and Glamsterdam’s major features will include Block-level Access Lists and enshrined Proposer-Builder Separation. Now we begin outlining the subsequent upgrade: Hegotá.

Thanks to Arantxa Zapico, Benedikt Wagner, and Dmitry Khovratovich from the EF cryptography team for their contributions, and to Ladislaus, Kev, Alex, and Marius for the careful review and feedback. The zkEVM ecosystem has been sprinting for a year. And it worked! We crossed the finish line for real-time proving! Now comes the next phase: building something mainnet-grade.

Disclaimer: The following blog is a proposal from the Stateless Consensus team. Content may not imply consensus views, and the EF is a broad organization that includes a healthy diversity of opinion across Protocol and beyond that together strengthen Ethereum. Special thanks to Ladislaus von Daniels and Marius van der Wijden for reviewing this article. Ethereum has grown from a small experimental network into a critical piece of global infrastructure. Every day it settles billions of dollars in value, coordinates thousands of applications, and anchors an entire ecosystem of L2s. All of this ultimately relies on a single underlying component: state.

Devconnect Buenos Aires wrapped up as the largest Ethereum Foundation event yet, bringing together a global mix of developers, founders, creators, and curious newcomers.

Q3 2025 brought an exciting wave of innovation and community energy! Explore the projects we funded this quarter and the work they’re advancing:

Disclaimer: The following blog is a proposal from the Account Abstraction team. Content may not imply consensus views, and the EF is a broad organization that includes a healthy diversity of opinion across Protocol and beyond that together strengthen Ethereum. Since the early days of Ethereum, the promise has always been bold: a global, permissionless, censorship-resistant computing platform. Today, that promise is more alive than ever. Ethereum has scaled through rollups, where blockspace is abundant and transactions are cheap. The challenge now is not just throughput, but seamless user experience across that multichain horizon. What if all the L2s felt like a single, unified Ethereum? No bridges to think about, no chain names to recognize, no fragmented balances or assets. That’s the vision of the **Ethereum Interop

Ethereum’s weekly All Core Developer calls are a lot to keep up with, so this "Checkpoint" series aims for high-level updates roughly every 4-6 weeks, depending on what’s happening in core development. See the previous update here. If you enjoy reading core development updates, you may also be keen to learn that Forkcast now publishes call summaries, chats and transcripts for each All Core Devs call, usually available within a couple hours of the call.

Fusaka follows this year's Pectra upgrade, representing a major step forward in Ethereum's scaling roadmap that improves L1 performance, increases blob throughput, and enhances user experience. The Fusaka network upgrade is scheduled to activate on the Ethereum mainnet at slot 13,164,544 (December 3, 2025, 21:49:11 UTC). Fusaka also introduces Blob Parameter Only (BPO) forks to safely scale blob throughput after PeerDAS activation. These are minimal, config-only upgrades that adjust the blob target/max and fee update fraction. See the activation table below for further details. The Fusaka mainnet client releases are listed below.