Solana Activates Alpenglow As Anza Targets Millisecond Finality
Summary
Anza says Solana activated Alpenglow on mainnet at slot 459,653,000 on October 21, retiring the TowerBFT consensus protocol without moving activity to another chain. The upgrade targets transaction finality of about 150 milliseconds, compared with roughly 12.8 seconds previously, though that figure is a stated target rather than an independently measured network-wide result. Finality is distinct from initial confirmation and does not guarantee instant user experiences or higher throughput. Anza says further networking, leader-rotation and post-quantum work remains planned, without committed release dates. Real-world performance under varying traffic and network conditions remains to be assessed.
