Solana's Next Big Upgrade: Alpenglow Set for Oct. 21, Targeting 150ms Finality

By Kevin · 2026-10-14 · News

Oct. 14 (CandyPulse) — Solana is about to get a lot faster at confirming transactions for good. Anza, one of the network's core developers, has set Oct. 21 for the mainnet-beta launch of Alpenglow, one of the biggest upgrades in Solana's history.

The headline goal: cut the time it takes for a transaction to become final from about 12.8 seconds to around 150 milliseconds.

Key takeaways

Alpenglow is scheduled to go live on Solana mainnet-beta on Oct. 21, around 14:50 UTC
It replaces the TowerBFT consensus system with a new one called Votor
Finality is targeted to fall from about 12.8 seconds to roughly 150ms
The Solana Foundation says 150ms is an expectation, not a constant
Wallets and apps keep working as they do today

What Alpenglow changes

Every blockchain needs a way for its validators to agree on which transactions are final. On Solana, that job has been done by TowerBFT. Alpenglow swaps it out for Votor, a new system built to reach agreement much faster.

The Solana Foundation points to epoch 1064, starting around 15:00 UTC, as the expected activation window.

	Before Alpenglow	After Alpenglow
Consensus system	TowerBFT	Votor
Time to finality	About 12.8 seconds	Target of about 150ms
Go-live	—	Oct. 21, around 14:50 UTC

About that 150ms number

The 150ms target is impressive, but the Solana Foundation is careful about it. It describes the figure as "an expectation, not a constant," measured against the stake distribution at the time of testing. Real-world results could vary.

It is also different from block time, which was already cut from 400ms to 200ms in earlier stages. Block time is about how fast blocks are produced; finality is about how fast they become permanent.

What it means for users and developers

For everyday users, the good news is that nothing breaks. The Foundation says wallets and apps keep working as they do today.

For developers, there is one practical tip: only switch apps to wait for "finalized" status after Alpenglow is live. On TowerBFT, "finalized" still means waiting about 12.8 seconds.

What's next

Oct. 21: Alpenglow activates on mainnet-beta
Later: Rotor, the planned replacement for Solana's data-sharing system Turbine, is due in a future release
After launch: watch real-world finality times to see how close they get to 150ms

If it works as planned, Alpenglow could make Solana one of the fastest major blockchains to reach finality.

Disclaimer: This article is for information only and is not financial advice. Crypto assets are volatile and can lose value. Always do your own research before making any investment decision.