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AI summary of a third-party reportBullishNewsDesk

Solana sets 21 October for Alpenglow consensus upgrade

Solana's Alpenglow upgrade activates in epoch 1064 on Wednesday 21 October, replacing TowerBFT and targeting finality of about 150 milliseconds, the Solana Foundation says.

Why it matters: The upgrade cuts Solana's finality from about 12.8 seconds to roughly 150ms, a change the article links to payments, DeFi and trading desks settling positions.

InvestIn.News NewsDesk · 1 min read
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Picture from Decrypt for: Solana sets 21 October for Alpenglow consensus upgrade
Image: Decrypt
Original reporting: Jose Antonio Lanz, Decrypt

Key points

  • Alpenglow goes live in epoch 1064, expected to start around 15:00 UTC on Wednesday 21 October.
  • It replaces TowerBFT and targets transaction finality of roughly 150ms, against about 12.8 seconds today.
  • Validators approved the change in September 2025, when SIMD-0326 passed with 98.27% of votes cast in favour.

Solana has fixed 21 October for Alpenglow, the upgrade that replaces the consensus system its validators use, according to the Solana Foundation.

Votor, the voting protocol shipping with Alpenglow, moves validator votes off the chain. Validators message each other directly and package votes into certificates, so a block can be locked in after one round of voting, or two at most.

TowerBFT stays in charge for about 18 minutes after the gate opens, with Alpenglow taking control at slot 459,653,000. Rotor, the second half of the upgrade, has no date.

What to watch: Rotor, the replacement for the Turbine block-data broadcast system, is still to come and has no date.

Read the full story on Decrypt

Live updates on NewsFeeds:AltcoinsDesk editor: Keshav Aggarwal (accountable for this page; this summary was not edited by hand)

How this was produced: an AI model wrote this summary of Decrypt’s report, which we credit and link above. Read our Editorial and AI policy. Spotted a mistake? See Corrections.

Not investment advice. Read the risk disclaimer.

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