Solana reduces slot time to 350 ms, beginning multi-phase speed upgrade

The Solana blockchain network has reduced its target slot time to 350 milliseconds, marking the first such adjustment since the network's launch. The change, confirmed by Solana Foundation Vice President of Technology Jacob Creech on August 21, 2026, initiates a multi-phase roadmap aimed at ultimately halving the original 400-millisecond benchmark to 200 milliseconds.

The reduction is the first step under SIMD0525, a technical proposal that was approved and merged on May 14. The plan outlines a sequence of four progressively shorter slot configurations: 350ms, 300ms, 250ms, and finally 200ms. Following the activation, monitoring systems showed average slot durations hovering around 360ms.

Shorter slot times are designed to reduce confirmation latency and accelerate network operations. A slot is a unit of time during which a validator produces a block. By compressing this interval, slot-based confirmation thresholds can be reached in less real-world time. The change also reduces the duration of an epoch, a larger cycle of slots. With the network maintaining 432,000 slots per epoch, the move from a 400ms target to 350ms cuts the theoretical epoch length from approximately 48 hours...