Solana Alpenglow upgrade targets October 21 mainnet launch

CryptoVideos brief
Built from 5 sources 13 Oct 2026 · 19:44 UTC 1 min read Main editor: Earl Jacobson

Solana's Alpenglow consensus upgrade is scheduled for mainnet on October 21, targeting transaction finality of approximately 150 milliseconds. The upgrade replaces TowerBFT and is described as the network's most significant consensus upgrade. Both reports put SOL near $107 on October 13, but they differ on the daily move. One says the date was confirmed by developer Anza, while another says official documentation has not confirmed it.

Key points

Solana's Alpenglow upgrade is scheduled to reach mainnet on October 21.
The upgrade targets transaction finality of approximately 150 milliseconds.
Alpenglow replaces the TowerBFT consensus protocol on Solana.
The upgrade is described as Solana's most significant consensus upgrade.

Why it matters

The upgrade targets faster finality, which the reports link to potential network performance gains. The reports also say delays or technical issues could affect sentiment.

What's unclear

Reports conflict on SOL's daily price move on October 13, with one citing a 4% drop and another a 0.3% gain.

One report says developer Anza confirmed the October 21 activation date, while another says official documentation has not confirmed it.

Price context · SOL

At publication

$107.50

Now

$89.88

Change since

−16.39%

7 days

Sources · 5 publishers

The Defiant Tier 1 First report 13 Oct, 15:06 UTC

Anza Sets Oct. 21 for Solana’s Alpenglow Mainnet Upgrade

Crypto Briefing Tier 2 13 Oct, 15:07 UTC

Solana’s Alpenglow upgrade targets October 21 for 150ms finality

Crypto Briefing Tier 2 13 Oct, 19:31 UTC

Solana’s Alpenglow upgrade to enhance transaction speed on October 21

CoinGape Tier 2 13 Oct, 19:38 UTC

Solana Alpenglow Upgrade Set for October 21, Here’s Why It Matters

CoinDesk Tier 1 14 Oct, 04:11 UTC

Solana sets Oct. 21 for Alpenglow upgrade targeting 150-millisecond finality

Crypto Briefing Tier 2 14 Oct, 04:14 UTC

Solana targets 150-millisecond finality with Alpenglow upgrade on Oct. 21

Crypto.news Tier 2 14 Oct, 07:11 UTC

Solana price falls 9% ahead of major October 21 upgrade

Coverage timeline

Oct 13, 15:06First reported by The Defiant
Oct 13, 15:07Also reported by Crypto Briefing
Oct 13, 19:44CryptoVideos brief published
Oct 14, 04:11–07:113 more publishers added to sources
Oct 15, 05:30Brief updated

How this page is checked. AI drafted this brief from selected independent reports. Automated checks compare numbers, source coverage and topic terms, but may miss errors. Publication and evidence refreshes run automatically. Read the linked reports for context. Report an error