Sepolia Gas Limit Triples Under Glamsterdam Ethereum's (@ethereum) Glamsterdam upgrade is now live on the Sepolia testnet, pushing the network's processing limit to nearly 200 million gas per
Ethereum's (@ethereum) Glamsterdam upgrade is now live on the Sepolia testnet, pushing the network's processing limit to nearly 200 million gas per block. That represents more than a threefold increase from the previous cap of roughly 60 million, and marks the first public test of one of Ethereum's most significant Layer 1 scaling changes in recent memory.
Early test blocks used between 26% and 46% of the new capacity, with sampled blocks consuming roughly 52 million to 92 million gas. A six-minute voting period produced all scheduled blocks and drew 99.97% of eligible stake toward finality, an encouraging early signal for network stability under the expanded budget.
Glamsterdam combines two components: Gladius on the consensus layer and Amsterdam on the execution layer. The gas limit on Sepolia reached its 200 million target just 11 hours after the fork activated, and Geth's time to process equivalent blocks dropped from around 115 milliseconds to roughly 30 milliseconds.
The upgrade also adjusts transaction processing and data-access costs, changes that could require developers to retest applications built around specific gas assumptions.
The Sepolia deployment was not entirely smooth ahead of launch. Ethereum validator client Prysm released a last-minute update, version 7.2.1, to automatically apply the new gas limit for validators. Older versions would have defaulted to the original 60 million limit unless manually reconfigured, which could have undermined the test.
With Sepolia now underway, attention turns to Hoodi, the next public testnet in the sequence. That activation is tentatively scheduled for October 27, pending results from Sepolia. Ethereum mainnet has no confirmed activation date, and no final production gas limit has been set. The Sepolia fork itself was delayed from an earlier August date.
The distinction between testnet and mainnet remains important. A higher gas limit on Sepolia shows that developers are stress-testing capacity and looking for bottlenecks, not that mainnet is ready to adopt the same ceiling. Larger blocks raise computational demands on nodes and validators, and developers will use data from both Sepolia and Hoodi to determine what parameters are safe for production.
Sources:Ethereum Foundation: Glamsterdam Testnet AnnouncementCoinTelegraph: Ethereum's Glamsterdam upgrade launches on Sepolia testnetCoinDesk: Ethereum's Glamsterdam test runs near 200 million gas per block
