Solana completes 200ms slot rollout on mainnet
Solana mainnet moved to a 200-millisecond target slot time at the start of epoch 1053 on October 9, 2026, at about 14:35 UTC. That change completed a four-stage reduction from 400ms and was the final step from 250ms to 200ms under SIMD-0525. The rollout also doubled block frequency from Solana’s genesis-era rate and shortened epoch length from about two days to roughly one day.
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Users and validators on Solana notice the new cadence immediately, because mainnet is now operating at a 200-millisecond target slot time. That means block production is now set to the faster timing described for epoch 1053 on October 9, 2026.
In practice, the network now runs on the final 250ms-to-200ms step of SIMD-0525, rather than the earlier 400ms setup. What stays the same is that this is still a target slot time on mainnet, not a different chain or a different network.
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