Solana’s Biggest Consensus Overhaul, Alpenglow, Hits 100x Speed Gains

• Solana’s Alpenglow has gone live on the community test cluster and is running on validator infrastructure as it readies to debut on the mainnet.
• Alpenglow has cut down finality time by 99% from 13 seconds to less than 200 milliseconds, making Solana the fastest major blockchain.

Alpenglow, the biggest consensus upgrade on the Solana network, has finally gone live on the community test cluster to replace the network’s consensus layer and cut finality time.

Anza, a Solana research firm, announced the move, stating that “the biggest consensus change in Solana’s history, is now running on validator infrastructure ahead of mainnet.” Anza called on validators to join the cluster and help stress-test the new consensus layer.

Alpenglow is live on the community test cluster

The biggest consensus change in Solana's history, now running on validator infrastructure ahead of mainnet

We’re now inviting more validator operators to participate in the next community cluster

— Anza (@anza_xyz) May 11, 2026

Alpenglow has been previously tested on a maximum of 45 node clusters inside Anza’s infrastructure. With the new move, any external validator can run the new consensus code now in a live environment for the first time.

Alpenglow is a new consensus protocol developed by the team at ETH Zurich. Currently, Solana relies on two systems: Proof of History to timestamp and order transactions, and TowerBFT as the voting mechanism on which validators agree on the state of the network. These have worked well for years, making Solana one of the fastest networks (it has a 12.8-second finality compared to Ethereum’s 12 minutes). However, in periods of peak demand, they have broken down quite a few times, giving Solana the unwanted reputation of ‘the outages network.’

Alpenglow replaces the two with Rotor and Votor. The first is the block propagation protocol that gets the block data out to the validators to vote on. Votor, on the other hand, handles block finalization by validators, and from data recorded since Alpenglow went live yesterday, it is doing so in around 150 milliseconds, a 99% drop from the 12.8 seconds it previously took.

Alpenglow Kickstarts a New Era for Solana

With Alpenglow available to the broader community, operators of validator software can now perform the Alpenswitch. This is the act of switching from the existing Solana mechanism to Alpenglow in a live environment without disrupting the rest of the network.

The Alpenswitch does not require a hard fork or any major technical changes. It’s an important part of the process as it allows the developers to assess any challenges before rolling onto the mainnet later this year. It also offers a path for validators to roll back into the existing consensus mechanism if any challenges spring up under Alpenglow without crashing the network.

Max Resnick, the lead economist at Anza, told one outlet:

“We are particularly interested in the performance of the migration between towerBFT and Alpenglow, which went smoothly on the test cluster and we will continue testing switching back and forth on the cluster. We saw that after the switch over time to finality came down ~100x.”

According to Solana founder Anatoly Yakovenko, Alpenglow could land on the mainnet in Q3.

SOL trades at $96.6, gaining marginally over the past day to bring its weekly gains to 14%.

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