Solana quietly crossed a meaningful threshold on July 29, 2026. The network activated SIMD-0286 on mainnet during Epoch 1009, raising the maximum block compute units from 60 million to 100 million. That 66% jump in per-block capacity is the single largest throughput expansion Solana has made in recent memory.
For context: compute units are roughly how Solana measures the computational cost of processing transactions. Think of them like seats on a plane. Before this upgrade, the plane had 60 million seats. Now it has 100 million. More transactions can fit into each block without waiting for the next one.
What SIMD-0286 actually changes
The upgrade was authored by Lucas Bruder of Jito Labs and first proposed publicly on GitHub in May 2025. It went through testnet and devnet trials before landing on mainnet, which is the standard cautious path for changes this significant.
Not everything changed, though. The writable account compute unit cap remains at 12 million CUs, and the maximum block data size delta stays at 100 MB. The upgrade is surgical: more room per block, same slot timing, zero required changes to existing applications.
