Network upgrade notifications
Solana Upgrades
Track network changes, validator actions, client support, and rollout status for Solana protocol and performance upgrades.
Agave 4.5
PlannedExpected December 2026Agave 4.4
PlannedExpected November 2026In Development
sBPFv3 Programs
New program deployments must target sBPFv3. Programs already onchain keep running.
4 → 1
Program formats accepted for new deployments
v3
Minimum sBPF target for deploys and upgrades
View details
In Development
Deeper CPI Nesting
Programs can call each other 8 levels deep, up from 4
4 → 8
Maximum nested CPI calls
All formats
Applies to legacy, v0, and v1 transactions
View details
Agave 4.2
ShippedAugust 2026Live on Mainnet
Agave 4.2 Release Overview
Cheaper rent, larger transactions, and faster slots — and the groundwork for Alpenglow
90%
Rent reduction, phased over 5 steps
4096
Bytes per transaction, up from 1232
View details
Live on Mainnet
Reduced Slot Times
Slot times cut from 400ms to 200ms
200ms
Mainnet slot time, down from 400ms
30s
Blockhash expiration window, down from 60s
View details
Partially Activated
Reduced Rent
Cutting the cost of on-chain storage by 90%
90%
Rent reduction, phased over 5 steps
696
Target lamports per byte, down from 6,960
View details
Live on Mainnet
Larger Transaction Sizes
The maximum transaction size is now 4096 bytes, up from 1232
4096
Bytes per transaction, up from 1232
3.3x
More room for ZK proofs, multisigs, and batches
View details
Unscheduled
Completed
Agave 4.3
ShippedOctober 20261 upgrade, all live on mainnet+
Agave 4.3
ShippedOctober 2026Agave 4.1
ShippedMay 20265 upgrades, all live on mainnet+
Agave 4.1
ShippedMay 2026Live on Mainnet
100M CU Blocks
Raising Solana's block limit from 60M to 100M compute units
100M
Compute units per block, up from 60M
66%
Increase in block capacity
View details
Live on Mainnet
BLS Pubkey and the Validator Admission Ticket
VAT is live on mainnet; register a BLS pubkey and fund your vote account to stay in consensus
2,000
Max validators admitted under VAT
0.8 SOL
VAT fee per epoch from the vote account, since Alpenglow activated
View details
Live on Mainnet
New Cryptography Schemes
Native syscalls for BN254 G2 and BLS12-381 curve operations
10-20x
Lower compute vs pure-BPF implementations
128-bit
Security level with BLS12-381
View details
Live on Mainnet
XDP on Solana
Kernel-bypass networking for faster block propagation on Solana
200x
Latency Reduction vs. Standard Networking
100M
Compute Units per Block (Enabled by XDP)
View details
Live on Mainnet
Optimized Token Program
Up to 98% More Efficient Token Operations on Solana
95-98%
Reduction in Compute Units
10%
More Total Block Space
View details
Agave 4.5
PlannedExpected December 2026| Upgrade | Key metric | Status |
|---|---|---|
| More Accounts per Transaction A v1 transaction can name 96 accounts, up from 64 | 64 → 96 Accounts per v1 transaction | In Development |
Agave 4.4
PlannedExpected November 2026| Upgrade | Key metric | Status |
|---|---|---|
| sBPFv3 Programs New program deployments must target sBPFv3. Programs already onchain keep running. | 4 → 1 Program formats accepted for new deployments | In Development |
| Deeper CPI Nesting Programs can call each other 8 levels deep, up from 4 | 4 → 8 Maximum nested CPI calls | In Development |
Agave 4.2
ShippedAugust 2026Release overview
Cheaper rent, larger transactions, and faster slots — and the groundwork for Alpenglow
90%
Rent reduction, phased over 5 steps
4096
Bytes per transaction, up from 1232
200ms
Slot times, down from 400ms
| Upgrade | Key metric | Status |
|---|---|---|
| Reduced Slot Times Slot times cut from 400ms to 200ms | 200ms Mainnet slot time, down from 400ms | Live on Mainnet |
| Reduced Rent Cutting the cost of on-chain storage by 90% | 90% Rent reduction, phased over 5 steps | Partially Activated |
| Larger Transaction Sizes The maximum transaction size is now 4096 bytes, up from 1232 | 4096 Bytes per transaction, up from 1232 | Live on Mainnet |
Unscheduled
| Upgrade | Key metric | Status |
|---|---|---|
| Durable Nonce Deprecation Moving offline signing out of the runtime and into onchain programs | ~6 months Migration window after the replacement program is ready | In Development |
Completed
Agave 4.3
ShippedOctober 20261 upgrade, all live on mainnet+
Agave 4.3
ShippedOctober 2026| Upgrade | Key metric | Status |
|---|---|---|
| Alpenglow Solana's new consensus protocol delivers sub-second finality | ~150ms Target finality, down from 12.8 seconds | Live on Mainnet |
Agave 4.1
ShippedMay 20265 upgrades, all live on mainnet+
Agave 4.1
ShippedMay 2026| Upgrade | Key metric | Status |
|---|---|---|
| 100M CU Blocks Raising Solana's block limit from 60M to 100M compute units | 100M Compute units per block, up from 60M | Live on Mainnet |
| BLS Pubkey and the Validator Admission Ticket VAT is live on mainnet; register a BLS pubkey and fund your vote account to stay in consensus | 2,000 Max validators admitted under VAT | Live on Mainnet |
| New Cryptography Schemes Native syscalls for BN254 G2 and BLS12-381 curve operations | 10-20x Lower compute vs pure-BPF implementations | Live on Mainnet |
| XDP on Solana Kernel-bypass networking for faster block propagation on Solana | 200x Latency Reduction vs. Standard Networking | Live on Mainnet |
| Optimized Token Program Up to 98% More Efficient Token Operations on Solana | 95-98% Reduction in Compute Units | Live on Mainnet |