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Ethereum Glamsterdam Upgrade Scheduled for Sepolia Testnet Activation on October 6

Ethereum developers plan to deploy the Glamsterdam hard fork to the Sepolia testnet on October 6, while a mainnet release date remains undecided.

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Ethereum developers have set October 6, 2026, for the activation of the Glamsterdam upgrade on the Sepolia testnet. Because testnet tokens have no financial value, this deployment serves as a rehearsal for the hard fork, which will require all network nodes to adopt the software changes simultaneously once deployed to the main network. A mainnet schedule will be determined only after testing concludes successfully.

The Sepolia trial features a gas limit target of 200 million. Expanding the block gas limit allows more transactions to fit into a single block, which could lower fees during periods of heavy on-chain demand. However, the upgrade roadmap has experienced delays in prior cycles.

As of October 1, Ethereum traded at $2,706, down roughly 45% from its August 2025 peak of $4,946. Throughout September, the asset fluctuated between $2,355 and $2,807 as the broader crypto market attempted to recover from three consecutive quarters of declines. Because upgrade plans are discussed openly in public developer forums well in advance, market participants had largely priced in the testnet timeline.

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