# Solana's Alpenglow Consensus Rewrite Reaches Both Public Test Networks Ahead of a Mainnet Decision

The upgrade targets finality of about 150 milliseconds against roughly 13 seconds today, and validator client software carrying it is already recommended to every mainnet operator.

- Published: 2026-09-27T05:54:44.199Z
- Canonical: https://polylog.news/crypto/2026-09-27/solana-s-alpenglow-consensus-rewrite-reaches-both-public-tes
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [CoinDesk](https://www.coindesk.com/tech/2026/09/26/solana-s-150-millisecond-settlement-upgrade-reaches-second-public-test-network)

Alpenglow, the replacement for Solana's consensus and voting machinery, is now running on both of the network's public test networks, giving application teams a place to check their software before the production chain switches over. The de…

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