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Solana tests Alpenglow upgrade to cut transaction finality from 12.8s to 150ms

Protocol Fundamentals
23 Sep 2026
Coindesk
View Source
Bullish
Solana tests Alpenglow upgrade to cut transaction finality from 12.8s to 150ms

Solana has launched the Alpenglow upgrade on its public test network, aiming to reduce transaction finality time from about 13 seconds to 0.15 seconds. This upgrade replaces the current TowerBFT consensus with a new voting protocol called Votor, enabling faster block finalization after one or two voting rounds. The change allows exchanges, bridges, and merchants to treat payments as irreversible almost immediately, improving transaction speed without altering user experience. The upgrade requires validators to use Agave 4.3 software, with a tentative mainnet update scheduled for September 28, though the official Alpenglow launch date is not yet confirmed.

As of Sep 23, 2026 12:31 WIB, Solana (SOL) is trading at Rp2.118.640 on Pluang, showing a 1-day gain of 2.64%. The platform sees balanced order activity with 50% Sell and 50% Buy, and the typical hold time is 70 days. This steady trading environment coincides with Solana's ongoing technical upgrade efforts to improve transaction speed and finality.

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