Solana’s network upgrade targets 150 ms finality, down from 12.8 seconds

Solana has scheduled its Alpenglow network upgrade for October 21, 2026 , targeting a cut in transaction finality from about 12.8 seconds to roughly 150 milliseconds. The change aims to make a payment irreversible almost as quickly as it first appears confirmed, replacing the voting system validators use to agree on blocks. Key takeaways Alpenglow’s activation is tied to Solana’s epoch 1064. Votor will move validator voting off-chain. Validators face new software requirements and a 0.8 SOL admission fee. Users will keep the same transaction formats and fees. According to Decrypt , the Solana Foundation expects epoch 1064 to begin around 15:00 UTC that Wednesday. CoinDesk also reported the schedule, stressing that 150 milliseconds is a performance target rather than a fixed outcome under all network conditions.

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