The Alpenglow upgrade, scheduled for October 21, 2026, targets block transaction finality of approximately 150 milliseconds on the Solana network, depending on network conditions

From the articleAnza Sets Oct. 21 for Solana’s Alpenglow Mainnet UpgradeAlso in Solana targets 150-millisecond finality with Alpenglow upgrade on Oct. 21, SOL news: Solana sets Oct. 21 for Alpenglow upgrade targeting 150-millisecond finality