--- title: Glamsterdam Testnet Announcement | daily.dev description: The Glamsterdam network upgrade, combining the Amsterdam execution layer upgrade and the Gloas consensus layer upgrade, is scheduled to activate on the Sepolia... canonical: https://daily.dev/posts/glamsterdam-testnet-announcement-mqsneqgjf twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Glamsterdam Testnet Announcement | daily.dev og:description: The Glamsterdam network upgrade, combining the Amsterdam execution layer upgrade and the Gloas consensus layer upgrade, is scheduled to activate on the Sepolia... og:url: https://daily.dev/posts/glamsterdam-testnet-announcement-mqsneqgjf og:image: https://api.daily.dev/og/posts/MqsnEQGjF.png og:image:alt: Glamsterdam Testnet Announcement og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Glamsterdam Testnet Announcement **[Ethereum](https://daily.dev/sources/ethereum)** · 5 min read · 0 upvotes · 0 comments ## Summary The Glamsterdam network upgrade, combining the Amsterdam execution layer upgrade and the Gloas consensus layer upgrade, is scheduled to activate on the Sepolia testnet on October 6, 2026 at 13:53:36 UTC (epoch 353,024, slot 11,296,768). Key changes include enshrined proposer-builder separation (EIP-7732), block-level access lists (EIP-7928), and gas repricing (EIP-8037, EIP-8038) that better reflects state and execution costs. Node operators must update both execution and consensus layer clients before activation; Prysm 7.2.0 defaults to a 60M gas limit unless explicitly configured for 200M. Hoodi and mainnet activation dates have not yet been decided, and application developers are advised to test contracts against the new gas rules using the repricing impact guide. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### When does the Glamsterdam upgrade activate on the Sepolia testnet? Glamsterdam activates on Sepolia at epoch 353,024, slot 11,296,768, which corresponds to October 6, 2026 at 13:53:36 UTC. Node operators must update both execution and consensus layer clients before that time to remain on the upgraded network. Hoodi and mainnet activation dates have not yet been decided and will be announced separately. _Track rollout milestones like this on daily.dev so client upgrades don't catch your validator setup off guard._ ### What does EIP-7732 enshrined proposer-builder separation change in Ethereum's consensus protocol EIP-7732 brings the separation between block proposers and builders directly into the consensus protocol. A proposer includes a builder's commitment to an execution payload, the builder later reveals it, and the protocol itself handles payment, removing reliance on trusted middleware. A payload timeliness committee attests whether the payload and blob data arrived on time, and consensus validation is separated from execution validation. _Validator and builder infrastructure teams follow protocol changes like ePBS on daily.dev before duties shift under them._ ### Why does Prysm 7.2.0 default to a 60M gas limit after the Glamsterdam Gloas upgrade instead of 200M Prysm 7.2.0 supports the Sepolia fork but defaults to a 60M gas limit once Glamsterdam activates. Validators who want to propose with a 200M gas limit must configure it explicitly using version 2 proposer settings or the keymanager API, since the --suggested-gas-limit flag has no effect after Gloas takes effect. _Validators tuning client configs after a fork can follow gotchas like this Prysm default on daily.dev._ ## Similar posts on daily.dev - [Announcing the Platåberget Testnet](https://daily.dev/posts/announcing-the-plat-berget-testnet-59q8qe6ff) · Ethereum · 1 upvotes · 0 comments - [Checkpoint \#9: Apr 2026](https://daily.dev/posts/checkpoint-9-apr-2026-laorcirqw) · Ethereum · 0 upvotes · 0 comments - [Protocol Cluster Updates: May 2026](https://daily.dev/posts/protocol-cluster-updates-may-2026-a9md3yty7) · Ethereum · 0 upvotes · 0 comments - [Checkpoint \#7: Nov 2025](https://daily.dev/posts/checkpoint-7-nov-2025-iqb5iww6u) · Ethereum · 1 upvotes · 0 comments - [Glamsterdam Repricing Impact for Smart Contract Developers](https://daily.dev/posts/glamsterdam-repricing-impact-for-smart-contract-developers-yywzq2lwq) · Ethereum · 0 upvotes · 0 comments --- Tags: [#blockchain](https://daily.dev/tags/blockchain), [#ethereum](https://daily.dev/tags/ethereum) [View this post on daily.dev](https://daily.dev/posts/glamsterdam-testnet-announcement-mqsneqgjf) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Glamsterdam Testnet Announcement","url":"https://daily.dev/posts/glamsterdam-testnet-announcement-mqsneqgjf","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/glamsterdam-testnet-announcement-mqsneqgjf"},"datePublished":"2026-09-28T23:44:12.755Z","dateModified":"2026-09-28T23:44:39.865Z","description":"The Glamsterdam network upgrade, combining the Amsterdam execution layer upgrade and the Gloas consensus layer upgrade, is scheduled to activate on the Sepolia...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/c7655049f075ccad8e4816d74bdd31a4?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/c7655049f075ccad8e4816d74bdd31a4?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Ethereum","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Ethereum","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/881328ee52904833bc407acdbad603ee","url":"https://daily.dev/sources/ethereum"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/glamsterdam-testnet-announcement-mqsneqgjf","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"blockchain,ethereum","timeRequired":"PT5M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Ethereum","item":"https://daily.dev/sources/ethereum"},{"@type":"ListItem","position":3,"name":"Glamsterdam Testnet Announcement"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/glamsterdam-testnet-announcement-mqsneqgjf#faq","mainEntity":[{"@type":"Question","name":"When does the Glamsterdam upgrade activate on the Sepolia testnet?","acceptedAnswer":{"@type":"Answer","text":"Glamsterdam activates on Sepolia at epoch 353,024, slot 11,296,768, which corresponds to October 6, 2026 at 13:53:36 UTC. 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