Oct 21, 2026Solana activates Alpenglow upgrade, cutting finality to 150 millisecondsSolana validators replaced the network's original TowerBFT consensus protocol with Alpenglow at slot 459,653,000 on October 21, reducing transaction finality from 12.8 seconds to approximately 150 milliseconds.Oct 21, 2026·6 sources00
Oct 13, 2026Solana sets October 21 for Alpenglow upgrade targeting 150ms finalitySolana announced implementation of its Alpenglow upgrade on October 21, 2026. The upgrade will replace Solana's existing validator voting system, remove vote transactions from blocks, and target 150-millisecond finality.Oct 13, 2026·3 sources00
