Ethereum's Sepolia test network switched on the Glamsterdam upgrade on October 6 and began creating blocks whose gas limit is nearly 200 million, Decrypt reported. That is more than three times the 60 million limit on Ethereum's main network.
Gas measures the computing work needed to process activity on Ethereum, and the gas limit sets how much of that work fits in one block. A higher limit does not mean three times as many transactions. It gives blocks extra room when demand rises, which can help keep fees from jumping when the network is busy. In a snapshot of 25 blocks taken on October 8, blocks used only about 24% to 43% of the space available.
Bigger blocks put more strain on validators, the computers that lock up ETH as collateral to check and confirm blocks. That is why the limit has been raised in small steps. It went from 30 million to 32 million after a validator vote in February 2025 and later reached 60 million during 2025. The Fusaka upgrade, live since December 3, 2025, made 60 million the default.
Sepolia is a practice network whose tokens have no real value, so developers can test changes safely. No date has been set for the Hoodi testnet or for a mainnet upgrade, which means the 60 million limit on Ethereum's main network stays in place for the time being.
Why it matters for beginners
Testnet upgrades are rehearsals that let developers find problems before changes reach the network that holds real money. A higher gas limit on the main network could eventually mean more room during busy periods, but nothing changes there until a separate upgrade is scheduled and activated. Be wary of anyone who says you must do something with your ETH because of a testnet upgrade, since that is a common scam angle.
Source
Finvane summary of reporting by Decrypt. Facts and figures come from the original report; the wording is ours.
Read the original report: Ethereum Test Network Raises Block Limit to Over 3x Its Current Capacity ↗For education only, not financial advice. Crypto assets are volatile and you can lose money.