Ethereum upgrade 'Glamsterdam' opens for trial, expected to go live in 2026 According to Ethereum developer nixo.eth, the next phase of the Ethereum mainnet upgrade "Glamsterdam" has opened a call for proposals for top-level features, with a deadline of June 20th. There are currently 5 proposals covering on chain performance and protocol optimization. The upgrade plan will be launched after the completion of Fusaka, and the final launch time is expected to be in 2026. Non core proposals will enter the screening stage after July.