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Solana's 150-Millisecond Settlement Upgrade Enters Second Public Test Phase

Solana's Alpenglow upgrade aims to reduce transaction settlement times significantly and has entered the second public test phase.

Mercation Admin
September 26, 2026 1 min read
Solana's 150-Millisecond Settlement Upgrade Enters Second Public Test Phase

Alpenglow is now operational on both public test networks, enabling developers to validate applications before the main blockchain launch.

Solana has reached a significant milestone with its Alpenglow upgrade, designed to drastically cut transaction settlement times from an average of 12.8 seconds to approximately 150 milliseconds. This upgrade is currently operational on both the developer network (devnet) and the testnet, allowing developers to test their applications ahead of deployment on the main blockchain.

The transition to the devnet was announced by Anza, the firm behind Solana's core software, on September 25, following successful implementation on a separate testnet. The Solana Foundation has confirmed that Alpenglow is now active on both testing platforms.

This upgrade modifies the consensus process used by validators, enabling them to share votes directly rather than embedding them in blocks. This method aims to achieve consensus in as few as one or two voting rounds, which could expedite operations such as fund releases by exchanges and merchant notifications upon transaction completions.

While the Alpenglow upgrade promises enhanced speed, it is important to note that this target is based on simulated results and has yet to be validated in real-world market conditions. Additionally, while user transaction volumes may remain the same, the total transaction counts will likely decrease as validator votes are no longer included in these figures. The Foundation has advised data providers to adjust their metrics accordingly.

As of now, no official launch date for the Alpenglow mainnet has been set, though Anza's software timeline suggests that feature activations may resume on September 28, pending confirmation.