Summary

  • Glamsterdam activates on the Sepolia testnet on October 6, 2026, at 13:53:36 UTC as the first step after the 2025 Pectra mainnet launch.
  • The upgrade tests a 200M gas limit for validators against current client defaults of 60M to advance L1 scaling.
  • Hoodi testnet activation is proposed for October 27, 2026, pending confirmation after Sepolia performance checks.

Ethereum developers set the Glamsterdam upgrade for Sepolia testnet on October 6, 2026, at 13:53:36 UTC. This follows the Pectra mainnet launch in 2025. No changes hit mainnet that day.

The test pushes L1 scaling with higher gas limits.

Context

Ethereum's roadmap changed after the 2025 Pectra upgrade. Pectra brought EIP-7702. That lets externally owned account wallets act like smart contracts in one transaction.

It enabled batched calls and gas sponsorship. Glamsterdam tests execution layer tweaks on testnets first.

The Sepolia fork on October 6 starts the checks. Developers watch results before Hoodi on October 27. This keeps mainnet upgrades apart from test experiments.

Details

Glamsterdam pushes a 200M gas limit for validators. Client defaults stay at 60M. The goal raises L1 throughput with client updates.

EIP-7702 from Pectra gives the wallet base for these tests. Multiple channels confirm the Sepolia time.

Hoodi comes next only if Sepolia performs well. Confirmation happens on October 8.

"Sepolia forks next, on October 6, 2026. Hoodi is proposed for October 27, to be confirmed on October 8."

, Attribution (www.reddit.com)

Reaction

Institutional ETF flows and market risk appetite shape any short-term ETH price moves. Persistent inflows support prices. Weaker flows point to softer demand.

No immediate mainnet effects limit direct price impact from this testnet event.

Social Highlight · @ethereumfndn · unknown

The Glamsterdam upgrade will include gas repricings. Test fixes on the Platåberget testnet: full overview for background, impact, changes, resources, and more ... (link)

Ethereum teams review Sepolia metrics after October 6. The next step is the possible Hoodi fork on October 27 if tests go well.