The Alpenglow upgrade reduces Solana's transaction finality from about 12.8 seconds to roughly 150 milliseconds

From the articleSolana activates Alpenglow upgrade, cuts transaction finality to 150msAlso in Solana Activates Alpenglow on Mainnet, Swapping Out TowerBFT for a Faster Consensus Engine - Unchained, Anza's Alpenglow goes live on Solana, cutting finality to 150 milliseconds, Solana’s Alpenglow Launches on Mainnet, Targets 99% Faster Finality, Solana's Alpenglow upgrade set to cut finality to 150ms, Solana Alpenglow Goes Live in 'Most Ambitious' Upgrade Since Ethereum's Merge - Decrypt