Solana Begins Testing on Major Speed Upgrade: SOL Price to $150?

Solana (SO) is changing hands near $117, down 0.78% on the day, as the network’s biggest structural overhaul in years quietly clears a critical testing milestone.

There’s a number buried in this story that traders chasing the next leg up need to see before they place another order.Developers have pushed the Alpenglow upgrade to Solana’s public testnet, targeting a reduction in transaction finality from roughly 13 seconds to 0.15 seconds, replacing the current TowerBFT consensus mechanism with a new voting protocol called Votor.

Validators running Agave 4.3 can now test the migration on a live copy of the network without risking real funds, following more than four months of trials on a dedicated test environment.

Anza, the firm maintaining Agave, confirmed the move via its feature-gate tracker, and mainnet activation is currently penciled in for around September 28. Solana ETF demand remains firm, with $26.1M in net inflows on Sep. 21, lifting tracked cumulative flows to $1.44B.