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Solana Alpenglow is live: what changes for users
Solana's biggest upgrade since 2020 is live. Same wallet, same fees, much faster finality — and a few caveats.
Solana Alpenglow, the biggest change to the Solana network since 2020, went live on 21 October 2026. It replaces Solana's old voting system (TowerBFT) and aims to make transactions final in about 150 milliseconds instead of several seconds. If you just use a Solana wallet, nothing changes for you: same wallet, same fees. What changes is how quickly an app can treat your payment as done.
What the Solana Alpenglow upgrade changes
Until now, Solana validators recorded their votes as ordinary transactions on the chain and approvals piled up over several blocks. A transaction got a quick, conditional confirmation within seconds, and full finality after about 12.8 seconds, according to Decrypt.
With Alpenglow, validators send votes directly to each other and bundle them into certificates. If validators holding 80% of the stake vote yes, a block is final in one round; a second path uses two rounds that each need 60%. The target is finality in about 150 milliseconds under normal conditions. The protocol is designed to keep working even if up to 20% of stake acts maliciously and another 20% is offline.
The switch happened at slot 459,653,000, around 14:00 UTC on 21 October. Validators had approved the change in September 2025 with 98% in favour. It was built by Anza, the team behind the Agave validator software, and tested on a community test network since May 2026, where one migration failed and was rolled back before a later one succeeded.
What it means if you use Solana
- Your wallet stays the same. No migration, no new address.
- Fees and apps work as before. CoinDesk reports transaction fees and how applications run are unchanged.
- Payments can be settled sooner. An exchange can credit a deposit faster, and a shop can confirm a stablecoin payment without making the customer wait. How quickly you see it still depends on the service you use.
- Charts will look odd. Votes no longer count as transactions, so Solana's transaction totals will drop sharply. That is not a fall in real activity.
The caveats
150 milliseconds is a target under normal conditions, not a guarantee for every payment, and it still has to hold up on the live network. Validators now pay a flat admission fee of 0.8 SOL per epoch instead of vote fees, which CoinDesk puts at roughly 60% cheaper, but hardware and bandwidth costs remain. The number of validators fell to 659 at the end of September, and stake has become a little more concentrated: the largest ten validators now hold 24.5% of it. Faster finality does not fix that by itself.
Anza's CEO Brennan Watt called it "the largest, most ambitious blockchain upgrade since 'The Merge'". Whether users notice depends on wallets and payment apps actually using the faster finality.
Paying with crypto in Vilnius
The ZOLAK crypto bar at Vytenio g. 50D accepts payments in Bitcoin over Lightning and in USDC and SOL on Solana, among others. You can see the menu at bar.zolak.lt. We wrote about Solana stablecoin payments earlier this month in our post on Samsung Wallet and USDC.
Not financial advice.