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Solana Activates Alpenglow on Mainnet, Swapping Out TowerBFT for a Faster Consensus Engine

Unchained·October 21, 2026·1 min read
Solana Activates Alpenglow on Mainnet, Swapping Out TowerBFT for a Faster Consensus Engine

Solana activated Alpenglow on mainnet, replacing TowerBFT with a faster consensus engine. Onchain data shows the handover occurred at about 13:54 UTC on Wednesday, and finality now takes roughly 150 milliseconds. The upgrade, confirmed by Solana and Anza accounts, aims to improve network speed and efficiency.

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