Glamsterdam Upgrade Delayed to 2026 Q4, Developers Scramble to Meet 2027 Roadmap

Ethereum's next major upgrade, Glamsterdam, has been pushed back to Q4 of 2026. This change comes after developers realized that previous estimates were overly optimistic.

Glamsterdam is a significant update that includes breaking changes for some applications. As such, it requires thorough testing before its mainnet activation.

To facilitate this, the Ethereum team has launched Platåberget, a public testnet designed to run for several months. This environment will allow developers and users to test the post-Glamsterdam network and identify potential issues.