🟠 Queued: SIMD-0437-1 Rent Cut — Step 1 of 5
Activates on mainnet at the next epoch boundary — ≈ 31h 18m.
https://app.xroot.dev/upgrades/simd-0437-1-rent-cut-step-1-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
Activates on mainnet at the next epoch boundary — ≈ 31h 18m.
https://app.xroot.dev/upgrades/simd-0437-1-rent-cut-step-1-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
🟠 Queued: SIMD-0385 Transaction V1
Activates on devnet at the next epoch boundary — ≈ 14h 48m.
https://app.xroot.dev/upgrades/simd-0385-transaction-v1
What it breaks and how to prepare: https://xroot.dev/blog/solana-transaction-v1
Activates on devnet at the next epoch boundary — ≈ 14h 48m.
https://app.xroot.dev/upgrades/simd-0385-transaction-v1
What it breaks and how to prepare: https://xroot.dev/blog/solana-transaction-v1
🟢 Activated: SIMD-0437-2 Rent Cut — Step 2 of 5
Live on testnet since epoch 1013.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
Live on testnet since epoch 1013.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
🟢 Activated: SIMD-0385 Transaction V1
Live on devnet since epoch 1140.
https://app.xroot.dev/upgrades/simd-0385-transaction-v1
What it breaks and how to prepare: https://xroot.dev/blog/solana-transaction-v1
Live on devnet since epoch 1140.
https://app.xroot.dev/upgrades/simd-0385-transaction-v1
What it breaks and how to prepare: https://xroot.dev/blog/solana-transaction-v1
🟠 Queued: SIMD-0437-2 Rent Cut — Step 2 of 5
Activates on devnet at the next epoch boundary — ≈ 16h 54m.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
Activates on devnet at the next epoch boundary — ≈ 16h 54m.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
🟢 Activated: SIMD-0437-1 Rent Cut — Step 1 of 5
Live on mainnet since epoch 1028.
https://app.xroot.dev/upgrades/simd-0437-1-rent-cut-step-1-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
Live on mainnet since epoch 1028.
https://app.xroot.dev/upgrades/simd-0437-1-rent-cut-step-1-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
🟢 Activated: SIMD-0437-2 Rent Cut — Step 2 of 5
Live on devnet since epoch 1141.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
Live on devnet since epoch 1141.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
🟠 Queued: SIMD-0437-2 Rent Cut — Step 2 of 5
Activates on mainnet at the next epoch boundary — ≈ 21h 59m.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
Activates on mainnet at the next epoch boundary — ≈ 21h 59m.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
❤1
🟢 Activated: SIMD-0437-2 Rent Cut — Step 2 of 5
Live on mainnet since epoch 1033.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
Live on mainnet since epoch 1033.
https://app.xroot.dev/upgrades/simd-0437-2-rent-cut-step-2-of-5
What it breaks and how to prepare: https://xroot.dev/blog/solana-rent-cut-simd-0437
🟠 Queued: SIMD-0385 Transaction V1
Activates on mainnet at the next epoch boundary — ≈ 7h 8m.
https://app.xroot.dev/upgrades/simd-0385-transaction-v1
What it breaks and how to prepare: https://xroot.dev/blog/solana-transaction-v1
Activates on mainnet at the next epoch boundary — ≈ 7h 8m.
https://app.xroot.dev/upgrades/simd-0385-transaction-v1
What it breaks and how to prepare: https://xroot.dev/blog/solana-transaction-v1
🟢 Activated: SIMD-0385 Transaction V1
Live on mainnet since epoch 1035.
https://app.xroot.dev/upgrades/simd-0385-transaction-v1
What it breaks and how to prepare: https://xroot.dev/blog/solana-transaction-v1
Live on mainnet since epoch 1035.
https://app.xroot.dev/upgrades/simd-0385-transaction-v1
What it breaks and how to prepare: https://xroot.dev/blog/solana-transaction-v1
🟠 Queued: SIMD-0525-3 Slot Time → 250ms
Activates on mainnet at the next epoch boundary — ≈ 10h 35m.
https://app.xroot.dev/upgrades/simd-0525-3-slot-time-250ms
Activates on mainnet at the next epoch boundary — ≈ 10h 35m.
https://app.xroot.dev/upgrades/simd-0525-3-slot-time-250ms
🟢 Activated: SIMD-0525-3 Slot Time → 250ms
Live on mainnet since epoch 1036.
https://app.xroot.dev/upgrades/simd-0525-3-slot-time-250ms
Live on mainnet since epoch 1036.
https://app.xroot.dev/upgrades/simd-0525-3-slot-time-250ms
❤1
🟢 Activated: SIMD-0326 Alpenglow
Live on testnet since epoch 1042.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
Live on testnet since epoch 1042.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
🟠 Queued: SIMD-0326 Alpenglow
Activates on devnet at the next epoch boundary — ≈ 2h 55m.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
Activates on devnet at the next epoch boundary — ≈ 2h 55m.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
🟢 Activated: SIMD-0326 Alpenglow
Live on devnet since epoch 1167.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
Live on devnet since epoch 1167.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
🟠 Queued: SIMD-0525-4 Slot Time → 200ms
Activates on mainnet at the next epoch boundary — ≈ 30h 49m.
https://app.xroot.dev/upgrades/simd-0525-4-slot-time-200ms
What it breaks and how to prepare: https://xroot.dev/blog/solana-200ms-slots-simd-0525
Activates on mainnet at the next epoch boundary — ≈ 30h 49m.
https://app.xroot.dev/upgrades/simd-0525-4-slot-time-200ms
What it breaks and how to prepare: https://xroot.dev/blog/solana-200ms-slots-simd-0525
🟢 Activated: SIMD-0525-4 Slot Time → 200ms
Live on mainnet since epoch 1052.
https://app.xroot.dev/upgrades/simd-0525-4-slot-time-200ms
What it breaks and how to prepare: https://xroot.dev/blog/solana-200ms-slots-simd-0525
Live on mainnet since epoch 1052.
https://app.xroot.dev/upgrades/simd-0525-4-slot-time-200ms
What it breaks and how to prepare: https://xroot.dev/blog/solana-200ms-slots-simd-0525
🟠 Queued: SIMD-0326 Alpenglow
Activates on mainnet at the next epoch boundary — ≈ 24h 58m.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
Activates on mainnet at the next epoch boundary — ≈ 24h 58m.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
app.xroot.dev
SIMD-0326: Alpenglow — Solana Activation Status
Alpenglow is queued and activates on Solana mainnet at the next epoch boundary — expected around 2026-10-21 13:18 UTC. The new consensus algorithm — the largest consensus change since launch, targeting dramatically faster finality.
🟢 Activated: SIMD-0326 Alpenglow
Live on mainnet since epoch 1064.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
Live on mainnet since epoch 1064.
https://app.xroot.dev/upgrades/simd-0326-alpenglow
What it breaks and how to prepare: https://xroot.dev/blog/alpenglow-finality-in-numbers
app.xroot.dev
SIMD-0326: Alpenglow — Solana Activation Status
Alpenglow is queued and activates on Solana mainnet at the next epoch boundary — expected around 2026-10-21 13:18 UTC. The new consensus algorithm — the largest consensus change since launch, targeting dramatically faster finality.