Summary
- Ethereum Glamsterdam upgrade activates on the Sepolia testnet on October 6, 2026
- The change raises Ethereum's gas limit to 200 million while introducing gas repricings
- No mainnet date has been confirmed yet for this ethereum upgrade
The Ethereum Glamsterdam upgrade hits the Sepolia testnet on October 6, 2026, at 13:53:36 UTC. It marks the first of two planned testnet forks before any wider rollout.
This upgrade pushes Layer 1 scaling forward. It brings a higher gas limit and related gas repricings. The timing fits the network's steady development after earlier upgrades.
Context
Ethereum's roadmap keeps pushing scaling through hard forks one after another. Glamsterdam follows past work that grew blob space for Layer 2s. It now targets base layer capacity head on.
Staking activity holds steady. Roughly 868,000 validators earn close to 2.6 percent a year. More than 7 million ETH sits staked in 2026.
Details
Glamsterdam raises Ethereum's gas limit to 200 million. This change lifts base layer throughput. Gas repricings refine the fee mechanics at the same time.
"Glamsterdam raises Ethereum's gas limit to 200 million."
, Ethereum Foundation
Sepolia activates first. A second testnet fork on Hoodi follows on October 27. These steps let developers check the changes before any mainnet talk.
Outlook
The next steps focus on finishing the second testnet fork. Teams will track performance data after that. A mainnet date stays unconfirmed.