Solana Switches On 200-Millisecond Slots as Alpenglow Comes Into View

By Isaac • October 9, 2026 11:10 pm •

Solana has switched on 200-millisecond slots on mainnet, completing a staged effort to make blocks land twice as often as they did under the network’s original 400-millisecond target.

The change is easy to oversell, so the important distinction comes first: Solana is creating block-production opportunities more frequently, but the network’s total transaction capacity did not double. Developers reduced the computational budget available inside each slot to keep overall execution capacity per second roughly steady.

That makes this an upgrade in cadence and responsiveness—not a magic throughput button.

According to CryptoSlate, the October 9 activation creates five block-production opportunities per second, up from 2.5 under Solana’s original configuration. A network epoch now takes about 24 hours instead