Solana’s Agave v4.2 Targets August 17 Mainnet, Cuts Rent Costs ~90%

Solana is targeting another significant leap in raw performance, and this time the improvement runs deeper than just transaction throughput.

Anza has published the release schedule for Agave v4.2, targeting mainnet activation on August 17. The upgrade cuts on-chain rent costs by roughly 90%, phased in across five separate steps rather than all at once, while halving slot times from 400 milliseconds down to 200 milliseconds and raising the maximum transaction size from 1,232 bytes to 4,096 bytes.

This is a distinct client upgrade from Alpenglow, the consensus overhaul covered elsewhere on this site, though both point in the same direction: Solana continuing to push hard on latency and cost as its core competitive differentiators against other high-throughput chains.

The rent reduction is arguably the most consequential piece for everyday usage. Rent, the small deposit required to keep an account’s data alive on Solana, has been a persistent friction point for developers building applications with many small accounts, and a 90% cut meaningfully lowers the cost of that specific design pattern.

Doubling transaction size capacity from 1,232 to 4,096 bytes also matters beyond simple throughput, since more complex transactions bundling multiple instructions together become genuinely feasible without hitting size limits that previously forced developers to split logic across multiple transactions.

Want to understand what on-chain rent actually is and why it matters for blockchain developers? Learn more in the Bitcoin Academy.