Ethereum Fusaka Testnet Launch Set for October 2025

The Ethereum Fusaka testnet launch is scheduled for October 28, 2025, with the mainnet activation planned for December 3, 2025. Coordinated by core developers and supported by the All Core Devs Consensus (ACDC) group, this upgrade will impact ETH prices and Layer 2 solutions like Arbitrum. Leading the way are Ethereum core developers who are working towards improved performance and security. Vitalik Buterin has repeatedly emphasized the importance of these enhancements for the Ethereum ecosystem.