Congratulations,
@Solana! 💜
On October 21, 2026, Alpenglow went live on mainnet, replacing TowerBFT, the consensus protocol Solana has run since 2020. It is the first major consensus upgrade in the network's history, and a historic day for everyone building in this ecosystem.
The change is elegant. Validators now send votes directly to each other instead of recording them in later blocks, which brings finality from about 12.8 seconds to around 200 milliseconds in early readings, with 150 milliseconds as the target. Doing this on a live network, with execution untouched, is a remarkable piece of engineering.
As a Solana validator, we are proud to be part of this community. Huge congratulations to
@anza_xyz, the core contributors and every validator who helped make this day happen. We wish the whole Solana ecosystem all the best for what comes next.