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<p><strong>Ethereum</strong><a href="https://yellow.com/asset/eth" rel="noopener noreferrer nofollow">(ETH)</a> developers will switch on the <a href="https://yellow.com/research/glamsterdam-ethereum-18-change-bet-base-layer" rel="noopener noreferrer nofollow">Glamsterdam upgrade</a> on the Hoodi testnet Oct. 26, lifting the testnet's gas limit to 200 million while mainnet timing stays undecided.</p>
<blockquote>
 <h2 id="key-points">Key Points:</h2>
 <ul>
  <li>Glamsterdam goes live on Hoodi at 17:42:48 UTC on Oct. 26, 20 days after its Sepolia debut.</li>
  <li>Hoodi's gas limit will jump from 60 million to 200 million at the same epoch.</li>
  <li>Developers have not set a mainnet date, and ordinary ETH holders need not act.</li>
 </ul>
</blockquote>
<h2 id="ethereum-glamsterdam-hoodi-date">Ethereum Glamsterdam Hoodi Date</h2>
<p>The <strong>Ethereum Foundation</strong><a href="https://blog.ethereum.org/2026/10/16/glamsterdam-hoodi-announcement" rel="noopener noreferrer nofollow">said</a> in an Oct. 16 announcement that the fork will activate at Hoodi epoch 132,352, slot 4,235,264, at 17:42:48 UTC. The upgrade went live on the Sepolia testnet Oct. 6.</p>
<p>Client teams will use the Hoodi run to test software and network behavior before they choose a date for the main chain.</p>
<p>Hoodi's gas limit will <a href="https://blockonomi.com/ethereum-gas-limit-rises-as-glamsterdam-moves-to-hoodi-testnet/" rel="noopener noreferrer nofollow">climb</a> from 60 million to 200 million at the fork epoch, about 3.3 times its former level and in line with the setting already used on Sepolia. That is a test setting, not a mainnet commitment.</p>
<p>Node operators and validators on Hoodi <a href="https://www.newsbtc.com/ethereum-news/ethereum-hoodi-glamsterdam-october-26-testnet/" rel="noopener noreferrer nofollow">need</a> updated execution and consensus clients before activation, since a node running the old rules cannot follow the upgraded chain. During the Sepolia fork, some validator clients defaulted to a 60 million gas target, so operators had to change the setting by hand to propose 200 million gas blocks. Mainnet ETH holders have nothing to do yet.</p>
<p><strong>Also Read:</strong><a href="https://yellow.com/news/crypto-rally-problem-spot-buyers" rel="noopener noreferrer nofollow">Crypto's 39.6% Rally Has A Problem: Spot Buyers Aren't Keeping Up</a></p>
<h2 id="toni-wahrst-tter-s-view">Toni Wahrstätter's View</h2>
<p>Ethereum researcher <strong>Toni Wahrstätter</strong><a href="https://x.com/nero_eth/status/2111717098271732040" rel="noopener noreferrer nofollow">wrote</a> in a post that Hoodi is the final testnet before mainnet, adding that "300M feels like a realistic next step" once the 200 million limit is in place. That figure is not a confirmed Glamsterdam setting.</p>
<p>Glamsterdam rests on two core changes. Enshrined proposer-builder separation, or ePBS, moves the handoff between block proposers and builders into Ethereum's protocol and reduces reliance on trusted middlemen. Block-level access lists record the accounts and storage a block touches, letting clients read state and validate transactions in parallel.</p>
<h2 id="glamsterdam-gas-repricing">Glamsterdam Gas Repricing</h2>
<p>The upgrade also raises the cost of creating state, and replays of past mainnet transactions <a href="https://crypto.news/ethereums-next-upgrade-has-a-date-on-hoodi-but-not-on-mainnet/" rel="noopener noreferrer nofollow">flagged</a> a small group of contracts whose gas assumptions may break. A higher ceiling alone doesn't guarantee faster confirmations or lower fees.</p>
<p>The Plataberget testnet went live on Aug. 13, giving developers an early place to test Glamsterdam's gas model. Days later, the foundation's Protocol DevOps team <a href="https://cointelegraph.com/news/ethereum-foundation-warns-some-tools-may-break-with-glamsterdam-upgrade" rel="noopener noreferrer nofollow">warned</a> that any tool relying on a hardcoded maximum gas limit "will break" and must be updated. Sepolia followed on Oct. 6, and Hoodi is next in line.</p>
<p><strong>Read Next:</strong><a href="https://yellow.com/news/bitcoin-holds-dollar80000-a-pause-before-challenging-dollar87000" rel="noopener noreferrer nofollow">Bitcoin Holds $80,000: A Pause Before Challenging $87,000?</a></p>

Ethereum Readies Glamsterdam And 200M Gas Limit For Hoodi, But Mainnet Date Stays Open

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