# Solana finishes cutting its slot time to 200 milliseconds, half its original target, before the Alpenglow consensus upgrade

The last step of SIMD-0525 was set to activate at epoch 1053 on Oct. 9, and smaller per-slot budgets keep total capacity per second roughly flat while delays shrink.

- Published: 2026-10-10T05:48:41.996Z
- Canonical: https://polylog.news/crypto/2026-10-10/solana-finishes-cutting-its-slot-time-to-200-milliseconds-ha
- Publisher: Polylog (Crypto desk)
- Section: crypto
- Sources: [CryptoSlate](https://cryptoslate.com/solana-doubles-block-production-speed-to-200ms-as-network-prepares-for-alpenglow-upgrade/), [Solana Compass](https://solanacompass.com/news/solanas-200ms-slot-time-is-pending-on-mainnet-scheduled-to-go-live-at-epoch-1053-on-october-9), [Solana Compass](https://solanacompass.com/news/solana-activates-250ms-slot-time-at-epoch-1037-fourth-step-of-simd-0525), [Solana Research Forum](https://forum.solana.com/t/a-solana-program-change-can-be-compatible-with-one-consumer-but-not-another/5098)

Solana has halved its original slot-time target to 200 milliseconds. It is the final step of the Solana Improvement Document (SIMD) 0525. Anza builds Agave, the most widely used Solana validator client. Anza said the 200-millisecond feature…

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