Solana Alpenglow Upgrade Targets Q3 Mainnet for 150ms Finality
Solana is moving toward the implementation of Alpenglow, a major consensus upgrade designed to cut transaction finality from about 12.8 seconds to roughly 100–150 milliseconds. The upgrade is currently being discussed for a late Q3 or early Q4 2026 mainnet rollout, following the start of community validator testing on May 11.