Solana's Speed-First Bet Gets Boost with Alpenglow Upgrade

Solana co-founder Anatoly Yakovenko says the Alpenglow consensus upgrade validates the network's speed-first architecture. The upgrade, now live on a test cluster, aims to cut transaction finality from roughly 12.8 seconds to about 150 milliseconds.

Alpenglow replaces Proof of History and TowerBFT with two new components called Votor and Rotor. It has cleared Solana's validator set in September 2025 with more than 98% support, and is on track for a possible Q3 mainnet rollout.

Yakovenko framed Alpenglow as proof that Solana can manage MEV at the consensus layer rather than through external middleware. The approach contrasts with Ethereum's external relay and builder stack, which manages MEV outside the base layer.