Ethereum prepares Glamsterdam: testnet on October 6, a triple gas limit and what it means for spreads

Ethereum prepares Glamsterdam: testnet on October 6, a triple gas limit and what it means for spreads

The Ethereum upgrade called Glamsterdam goes live on the Sepolia test network on October 6. It is not a mainnet launch yet but a test, though the changes are serious: the block gas limit nearly triples and fees should fall by three quarters.

For an arbitrageur a network upgrade is not a reason to speculate but a reason to understand how the cost and speed of moving ether and its tokens will change.

What changes

There are a few main changes. The block gas limit is raised from 60 to 200 million, and transaction fees, by the estimates, should drop by about 79 percent.

Under the hood are two large reworks. Separating block proposal from building is wired straight into the protocol, and block-level access lists help clients read state and validate transactions in parallel.

How it ties into arbitrage

The link is through transfers. Cross-exchange trades in ether and its tokens often require moving the coin between venues, and the gas cost feeds directly into the cost of such a trade.

Cheaper gas means a higher net spread. In our view the fee cut will make some trades viable that today do not pay off precisely because of an expensive transfer, especially at smaller sizes.

What to keep in mind

This is still a testnet, not mainnet. In our experience weeks or even months pass between a test and a real launch, and you should not bake the new fees into a trade's maths in advance.

We believe it is worth tracking the upgrade exactly through the cost angle: once gas gets cheaper on mainnet, recalculate ether trades from scratch, because some of them will move from loss-making to viable.

Our tools

The cost of a transfer feeds directly into the net spread of an ether trade. Our arbitrage screener keeps dozens of venues in one window, refreshes quotes every second and shows each gap together with the volume actually behind it. The spread calculator helps you check what survives fees, network costs and slippage at your size. The bot is fully manual. It never connects to your exchange API keys.

To test the tools on a live market, ArbitrageScanner offers one day of free access to the whole ecosystem.

FAQ (Frequently Asked Questions)

1. What is Glamsterdam?

A major Ethereum upgrade. On October 6 it goes live on the Sepolia testnet: the block gas limit grows from 60 to 200 million and fees fall by about 79 percent.

2. Is this the mainnet launch?

No, it is only a test on Sepolia. A real launch usually comes several weeks or months later.

3. How does the upgrade affect arbitrage?

Through transfer costs. Cheaper gas means a higher net spread, and some ether trades move from loss-making to viable.

4. When should trades be recalculated?

When gas gets cheaper on mainnet, not on the test. Baking the new fees in ahead of time is premature.

Conclusion

Glamsterdam hits testnet on October 6: the gas limit triples and fees fall by nearly 79 percent. Under the hood are split block building and parallel transaction validation.

For arbitrage the key is transfer cost. When the upgrade reaches mainnet, ether trades are worth recalculating: some move from loss-making to viable. But baking the new fees in now is too early.

IMPORTANT! We are software developers. We do not give recommendations or promises of earnings and we do not advise you to invest your money anywhere. Our software is fully manual, all your money stays under your own control. We show examples of how our clients have earned on arbitrage in the past, but we do not advise repeating those actions one to one. Your earnings depend solely on your own actions and on market factors.