Solana’s major Alpenglow upgrade has officially entered community validator testing, bringing one of the network’s biggest technical changes closer to launch on the Solana mainnet.
Anza announced on May 11 that Alpenglow is now running on a community test cluster, allowing validator operators to test the new consensus system before wider deployment. The company described the project as “the biggest consensus change in Solana’s history.”
The upgrade is designed to dramatically improve Solana’s speed by reducing transaction confirmation times to around 150 milliseconds under the new architecture. Some earlier testing estimates even suggested confirmation speeds could reach close to 100 milliseconds in ideal conditions.
One of the biggest planned changes is the removal of Proof of History and on-chain vote transactions from Solana’s core consensus process. Developers say the new structure is intended to simplify block validation while improving network efficiency and reliability.
Alpenglow introduces a new lightweight voting system called Votor, which uses direct messaging, signature aggregation, and off-chain validator voting to finalize blocks faster. Depending on validator participation, blocks could reportedly be finalized in one or two voting rounds.
The proposal also adds a Validator Admission Ticket, known as VAT. Under the design, validators would pay a 1.6 SOL fee to join the network’s consensus set during each epoch.
According to Solana’s official upgrade roadmap, Alpenglow is still under development and is expected to arrive alongside Agave 4.1 in the future. More validator operators are now being invited to participate in testing before the upgrade eventually moves toward mainnet rollout.
Despite the importance of the announcement, market reaction remained relatively calm. Solana traded around $97 following the update, with only limited short-term price movement while the upgrade remains in testing.
