Crypto Briefing • October 6th 2026, 6:34 AM
Ethereum’s Sepolia testnet activates Glamsterdam with optional 200 million gas limit
Key Summary
Ethereum's Sepolia testnet has activated the Glamsterdam upgrade, which includes a 200 million gas limit option, allowing validators to opt-in to the increased capacity. This upgrade bundles structural changes with raw capacity increases, aiming to expand Layer 1 capacity. The opt-in structure on Sepolia allows developers to observe validator behavior and node performance under heavier blocks before committing to mainnet.
Please see our real time news feed on our Home Page
- Key Takeaways:
- Ethereum's Sepolia testnet activated the Glamsterdam upgrade on October 6, 2026.
- The upgrade includes a 200 million gas limit option, allowing validators to opt-in to the increased capacity.
- The opt-in structure on Sepolia allows developers to observe validator behavior and node performance under heavier blocks before committing to mainnet.
- Market & Token Impact:
- The 200 million gas limit is a significant increase from the previous ceiling of roughly 60 million.
- This upgrade bundles structural changes with raw capacity increases, aiming to expand Layer 1 capacity.
- The opt-in structure on Sepolia allows developers to observe validator behavior and node performance under heavier blocks before committing to mainnet.
- Broader Context & What's Next:
- The final mainnet gas limit has not been decided, and mainnet activation for Glamsterdam has not yet been scheduled.
- Developers will continue to test and refine the upgrade before committing to mainnet.
- The opt-in structure on Sepolia provides a safe testing ground for the upgrade, allowing developers to observe validator behavior and node performance under heavier blocks before committing to mainnet.
- Technical Details:
- The Glamsterdam upgrade combines two upgrade tracks into one package, covering the execution layer and the consensus layer.
- The upgrade includes enshrined proposer-builder separation, block-level access lists, and a round of gas repricings.
- The 200 million gas limit is a test target, not a promise, and will be refined before mainnet activation.