Solana Alpenglow: When the Upgrade Really Arrives and What Changes for Your Staking

Solana Alpenglow did not go live on mainnet in August 2026. What began on August 17 was the Agave 4.2 release, and that does not contain the new consensus at all. The Solana Foundation names the following release, Agave 4.3, and the month of October 2026 as its target for activation, with no fixed day and no block height. For you as a SOL holder, that means for now: nothing to click, nothing to migrate, no deadline. There is, however, one point you really should check, and it has been live since July 22, 2026. What it affects is less your wallet than the validator you have delegated your SOL to. In the worst case it has been costing you your entire staking yield for weeks, without any error message appearing. Why, is set out below under the heading BLS pubkey. What Solana Alpenglow is, and why it is not a price event Alpenglow is the planned replacement of Solana's consensus mechanism. Consensus here means the set of rules by which thousands of mutually independent computers agree on which transactions are valid and in what order. Until now, a mechanism called TowerBFT has done that job on Solana. Alpenglow replaces it with a voting algorithm called Votor. The metric at stake is fi...