Solana activates Alpenglow upgrade, cuts transaction finality to 150ms

Solana has successfully activated its Alpenglow upgrade, a significant enhancement designed to reduce transaction finality from 12.8 seconds to a mere 150 milliseconds. This upgrade, which took place on October 21, 2026, at approximately 13:20 UTC, replaces the TowerBFT consensus mechanism with Votor. The Alpenglow upgrade also moves validator votes off-chain, potentially leading to changes in reported transaction counts without necessarily reflecting a drop in user activity. Market participants are observing how this technological improvement might impact Solana’s performance and user adoption.