Ethereum has a big upgrade lined up called Glamsterdam.
The foundation set it for the Sepolia testnet on October 6 2026 at that specific epoch. It comes after Fusaka and some researchers think it ranks among the larger forks they have done so far.

It pulls together stuff from Amsterdam on the execution side and Gloas on the consensus side. The idea is to get the main layer moving faster while keeping costs down and making it hold up better over time.

One part removes the need for outside services that handle block building. Builders just lock in what they offer and the system handles payments without extra trust steps. Validators also get a bit more room to check things through.

Another change lets transactions list the data they touch ahead of time. That opens the door to running some of them side by side instead of one after another. It looks like it could lift how much the chain handles at once and might speed up getting new nodes caught up too.

Gas costs are shifting as well so they line up more closely with real work on execution and keeping the state from ballooning. That should help slow down unnecessary growth in the database.

Testing starts on Sepolia then moves to Hoodi before any mainnet push which is aimed at late 2026. Node operators will need to update both types of clients ahead of time or it will not go smoothly.

After the Hegota fork next year this could be the last regular style upgrade before things move toward more advanced proof systems. It seems unclear though whether the base layer will end up matching the speed of its own layer twos in the

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