Ethereum is testing one of its biggest Layer-1 capacity increases yet as the Glamsterdam upgrade moves through Sepolia with blocks targeting a 200 million gas limit.
The test raises Sepolia’s previous limit of roughly 60 million gas by more than three times, allowing developers to measure whether Ethereum validators can safely process substantially larger blocks.
The change does not mean Ethereum mainnet will immediately move to 200 million gas. Instead, developers are using Sepolia to determine how far Layer-1 capacity can expand without creating excessive hardware or validation requirements.
Ethereum Tests More Than 3x Capacity
Gas represents the computational work required to execute transactions and smart contracts on Ethereum.
A higher block gas limit means more swaps, stablecoin transfers and smart-contract interactions can fit into each block before users begin competing heavily for available space.
Ethereum has already been gradually increasing its gas limit, but moving from 60 million to 200 million on Sepolia represents a much more aggressive test.
The experiment comes as developers try to expand Ethereum itself while maintaining the network’s broader Layer 2 scaling strategy.
Glamsterdam Changes How Ethereum Processes Blocks
Glamsterdam introduces several architectural changes designed to support higher throughput.
One is block-level access lists, which allow nodes to know which accounts and storage locations a block will use before execution. That could make it easier to process independent transactions in parallel instead of executing everything sequentially.
Another major feature is enshrined proposer-builder separation, or ePBS, which moves more of Ethereum’s block-building process directly into the protocol.
Earlier testing by Nethermind included 2,302 performance tests, processing 570.7 billion gas in just over three minutes as developers evaluated the design under heavier workloads.
These improvements are central to Ethereum’s broader scaling roadmap, particularly as blockchain activity grows across payments, DeFi and tokenized assets.
