Solana Activated Alpenglow: Finality Dropped to 150 ms

Solana activated the Alpenglow upgrade on the mainnet on October 21, 2026, and finality time dropped from about 12.8 seconds to 150 ms. This is the biggest consensus change in the network’s history. It matters for validators, traders, and DeFi users.

The Solana team said Alpenglow is already live on mainnet. According to Solana Compass, the switch point occurred at slot 459 653 000. Before that, the network ran on the old scheme for another 5000 slots after epoch 1064 started.

The upgrade did not happen in a single day. Voting on SIMD-0326 took place on September 2, 2025, and it was supported by 98.94% of votes. Against it were 1.05%, while another 0.36% went to abstain. Validators representing 52% of the total stake took part.

Why does this matter right now?

Alpenglow changes the network’s core operating logic. In simple terms, Solana started confirming blocks faster. That means less waiting for users and fewer delays for applications that rely on fast transactions.

But there is another important point. The upgrade does not end with a single switch. According to simd.watch, SIMD-0326 primarily covers Votor. Rotor for block propagation, Smart Sampling, and Lazy Execution have been moved into separate future changes. In other words, the network has taken a major step forward, but not the final version of the full plan.

For Ukrainian users, this is not a minor detail either. Faster finality is usually useful where quick transfers, trading, and DeFi services matter. That is why such changes are often noticed not only by developers, but also by those who simply hold SOL or work with tokens on this network.

What changed for validators and dashboards?

Before activation, validators had to move to Agave, Jito-Solana, or Harmonic Salsa v4.3.2. During the migration, Firedancer and Frankendancer were not supported. Also, the vote account must hold 0.8 SOL above the rent-exempt minimum for the Validator Admission Ticket.

This also changes the network’s economics. Old vote transactions cost about 1 SOL per epoch. After Alpenglow, they were replaced by a fixed VAT of 0.8 SOL per epoch, which is deducted from the vote account and burned. For validators, this is no longer a technical detail, but a new cost model.

Solana explicitly warned that TPS dashboards, benchmarks, and alerts need to be rebuilt. The reason is simple: validator votes are no longer recorded as transactions in blocks.

That is why old charts may show a sharp drop in activity, even though the actual load will not change. This is not a malfunction. It is a new accounting logic.

Market reaction

On October 21, 2026, SOL was trading near $108.31, up 1.77% on the day. The intraday range was $105.29–$108.75. This is not an explosive move, but the market is clearly watching the event.

According to CoinDesk, citing Bitwise, there were 659 active validators on the network at the end of September 2026. That is about 30% fewer year over year. Also, 69% of the SOL supply was staked, and the group of validators with more than one-third of the stake shrank from 20 to 18.

Against this backdrop, Solana is entering the upgrade not in perfect shape, but not in a weak one either. On the same day, DefiLlama showed $5.99 billion in TVL, $2.197 billion in DEX volume over 24 hours, 3.04 million active addresses, and 115.38 million transactions over 24 hours. That is a large base for a network that has just changed consensus.

In other words, the market did not just receive news of a technical update. It saw a test of whether the network can handle a faster operating mode without losing stability.

• Alpenglow launched on mainnet on October 21, 2026.

• Finality dropped from 12.8 seconds to 150 ms.

• The switch point was at slot 459 653 000.

• 98.94% of participants voted for SIMD-0326.

• Before migration, validators had to upgrade to v4.3.2.

• The new VAT is 0.8 SOL per epoch.

What does this mean for investors?

For long-term SOL holders, the main signal is simple: the network is moving toward faster and cheaper infrastructure. This does not guarantee price growth, but it strengthens Solana’s technical position in the competition for developers and users.

For traders, the more important point is different. After such upgrades, confusion often appears in metrics. If a dashboard shows a drop in TPS, that does not necessarily mean the network has become worse. Part of the old traffic will simply disappear from the accounting.

There is also a practical point. If you work with Solana assets, it is worth watching not only the SOL price. Track how TVL, DEX volume, and validator stability behave in the coming days. That is where you can see whether the upgrade really made the network easier to use.

For those who, after the Solana news, want to quickly convert assets into hryvnia, a convenient option may be to sell Ethereum ETH on Monobank, if the portfolio needs to be rebalanced without extra steps.

Frequently asked questions

What is Alpenglow in Solana?

It is a major upgrade to Solana’s consensus protocol. Its main effect is already visible in the numbers: finality has decreased from about 12.8 seconds to 150 ms.

Does the new TPS mean the network became faster?

Not always. After Alpenglow, some validator votes are no longer recorded as transactions, so old dashboards may show different values. Solana explicitly recommends rebuilding the metrics.

Will this affect regular users?

Yes, but not immediately and not equally for everyone. Validators, DeFi projects, and services with a large number of fast transactions will feel the changes most strongly.

Alpenglow has become Solana’s loudest technical step in recent years. Now the market will watch not the launch itself, but how the network performs in the first days after it.

This material is not financial advice. Cryptocurrency trading involves significant risks. Part of this text was prepared with the help of artificial intelligence based on public sources and reviewed by our editorial team.