JUST IN: @Solana activates Alpenglow on mainnet today, replacing its consensus mechanism with one targeting 150ms finality, roughly 40x…

First reported Oct 21, 2026, 15:40 UTC

Source reports

JUST IN: @Solana activates Alpenglow on mainnet today, replacing its consensus mechanism with one targeting 150ms finality, roughly 40x faster than TowerBFT’s 12.8 seconds. — @CoinDesk (X), Oct 21, 2026, 15:40 UTC
🔥 BIG: Solana launches Alpenglow on mainnet in the network’s biggest-ever consensus upgrade. — @Cointelegraph (X), Oct 21, 2026, 16:11 UTC
Solana hot-swapped its consensus mechanism today. TowerBFT is out, Alpenglow is in. It generates ~unbelievably fast~ finality at just 150ms. This is one of the most impressive technical upgrades of an in-flight blockchain since the Ethereum merge IMO. — @DrNickA (X), Oct 21, 2026, 17:44 UTC

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