Ethereum’s next major upgrade just slipped to late 2026, forcing a two-week scramble to save its 2027 roadmap

Ethereum developers are eyeing 2027 for Hegotá as they open a new public testnet for Glamsterdam, the network's next major upgrade now targeted for the fourth quarter of 2026.

The timeline marks a shift from previous expectations. Earlier this year, the Ethereum Foundation said Glamsterdam was targeting the first half of 2026, with Hegotá expected to follow later in the year.

That timeline has since slipped, with developers only now launching Platåberget, a public testing ground for Glamsterdam. This testnet is designed to run for several months before the upgrade moves to Ethereum's longer-lived Sepolia and Hoodi testnets.

Unlike earlier short-lived devnets, Platåberget gives developers and users a more stable environment to test the post-Glamsterdam network and identify problems before mainnet activation.

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