Reports claiming the Alpenglow mainnet launch is set for September 28 are incorrect. Solana co-founder Anatoly Yakovenko dismissed the speculation by responding with the single word “decel.”
Designed as a consensus overhaul, Alpenglow aims to achieve 150-millisecond finality, a major speedup from the current full finality time of about 12.8 seconds. Prior warnings from some outlets had suggested that failure to roll out the switch could trigger a drop in the price of SOL.
Alpenglow Mainnet Launch Date Traced to a Validator Schedule
Anza research head and ETH Zurich professor Roger Wattenhofer took to X to dispute the rumors. Anza is the developer behind Agave, which serves as Solana’s primary validator client.
Why would we test a protocol for only a few days before activating it? There is no Alpenrush.
Wattenhofer emphasized that public testing for Alpenglow had only just begun a few days prior.
Following this, Yakovenko quoted the post and added “decel,” a crypto term meaning to slow down, as opposed to “accel,” which denotes rushing forward.
The origin of the date appears to be Anza’s Agave v4.3 release schedule, which marks September 28 as the resumption of mainnet feature activation without ever referencing Alpenglow.
Similarly, the subsequent v4.4 timeline designates November 9 as the window for the next mainnet activation. Anza labels this schedule as tentative, and it likewise omits any mention of Alpenglow.
SOL Price Barely Reacts to the Clarification
Data from BeInCrypto Markets indicates Solana (SOL) traded at $119.85 at the time of writing, marking a 24-hour decline of 0.36%. This minimal price reaction implies that few market participants had priced in a September 28 Alpenglow mainnet deployment.
This cautious approach follows recent history: an August routing fault brought Solana near a network outage. Given that incident, Wattenhofer’s remarks indicate that developers are prioritizing caution to prevent a hurried consensus modification.
Alpenglow is not the sole speed enhancement currently under development. Solana initiated a reduction in block times from 400 to 200 milliseconds in August. That update accelerates block production, whereas Alpenglow focuses on shortening the time required for blocks to achieve finality.
Validator preparation for Alpenglow has been underway since July. At present, the upgrade remains on the testnet, and neither Agave timeline provides a specific mainnet release date.