Anza Moves Alpenglow Onto Solana Devnet, Targeting 150ms Finality Ahead of Mainnet
Anza activated the Alpenglow upgrade on Solana devnet, retiring TowerBFT and targeting 150ms finality, while Solana spot ETFs logged record daily inflows.
Why it matters
If Alpenglow reaches mainnet, Solana exchanges could credit deposits sooner and payment applications could confirm purchases at a fraction of current latency, and the staged validator rollout makes the change gradual rather than a single cutover. The ETF inflows are a separate demand signal; six straight days of buying capped by a record figure points at sustained interest in regulated Solana exposure rather than a one-day reaction.
Where the sources disagree
US spot Solana ETF single-day inflow
$86.67 million on September 25
CoinGape
$80 million on September 26
Bitcoin Insider
CoinGape put record inflows at $86.67 million on September 25, while Bitcoin Insider, citing CryptoBriefing and AMBCrypto, reported an $80 million single-day inflow on September 26 as the largest since the products began trading.
Stage of the Alpenglow rollout
Approaching public testnet activation; devnet testing continues before mainnet
CoinGape, CoinGape
Now active on devnet as of September 25
CoinGape
CoinGape described public testnet activation as approaching on September 24 with devnet testing still to come, then two days later reported Alpenglow already active on devnet with mainnet still ahead, so the two CoinGape pieces describe different phases of the same rollout.
Key facts
Anza activated the Alpenglow upgrade on Solana devnet and announced the transition on September 25, following a testnet switch a day earlier.
Disputed figureReported by CoinGape
At the devnet handoff the network produced its Alpenglow genesis block and retired the older TowerBFT consensus system.
Reported by CoinGape
Alpenglow targets finality of about 150 milliseconds, down from the current level of about 12.8 seconds.
150 msReported by CoinGape
The new design replaces TowerBFT with Votor, which lets validators vote directly and finalize blocks quickly.
Reported by CoinGape
Anza proposed on September 21 to adopt broad mainnet validators after staged deployments in which operators holding 10% and then 25% of staked SOL upgrade first.
10 %Reported by CoinGape
Validators were adopting Anza's Agave 4.3 software ahead of public testnet activation.
Reported by CoinGape
What happened
Anza announced on September 25 that Alpenglow was active on Solana devnet, the testing network where applications are checked before mainnet deployment, after a testnet switch a day earlier. At the handoff the network produced its Alpenglow genesis block and retired the older TowerBFT consensus system, and the upgrade aims to cut transaction finality from roughly 12.8 seconds to about 150 milliseconds. CoinGape reported on September 24 that the public testnet was approaching as validators adopted Anza's Agave 4.3 software, and that Anza had proposed on September 21 to move broad mainnet validators onto the upgrade after staged deployments in which operators controlling 10% and then 25% of staked SOL upgrade first; the new design replaces TowerBFT with Votor, letting validators vote directly and finalize blocks quickly. The two CoinGape pieces disagree on where the rollout stands, with the earlier one describing public testnet activation as approaching and the later one reporting devnet active with mainnet still to come. Separately, US spot Solana ETFs drew inflows that the two outlets size differently: CoinGape put record inflows at $86.67 million on September 25, while Bitcoin Insider, citing CryptoBriefing and AMBCrypto, reported an $80 million single-day inflow on September 26 as the sixth consecutive day of net buying. SOL traded near $114 on September 24 and above $120 by September 26, which CoinGape also described as the first break above $120 since January, about 58% below the January 2025 peak near $294.
How the story developed
- First report
First report by CoinGape
Solana Price Prediction as Alpenglow Upgrade Moves to Public Testnet
- Update
Anza proposes staged mainnet validator adoption
Anza proposed on September 21 to adopt broad mainnet validators after staged deployments, with operators holding 10% and then 25% of staked SOL asked to upgrade first.
- Update
Alpenglow approaches public testnet activation
Validators were adopting Agave 4.3 as the public testnet launch neared, with Solana trading near $114 on September 24.
- Update
Record US Solana ETF inflows of $86.67 million
CoinGape reported record inflows of $86.67 million into US Solana ETFs on September 25.
- Official statement
Anza announces Alpenglow active on devnet
Anza announced the devnet transition on September 25, a day after a testnet switch; the network produced its Alpenglow genesis block and retired TowerBFT.
- Update
Bitcoin Insider reports $80 million single-day ETF inflow
Bitcoin Insider, citing CryptoBriefing and AMBCrypto, reported an $80 million one-day US spot Solana ETF inflow, the sixth straight day of net buying, with SOL above $119.
How coverage built up
Independent sources over time, counted the way the consensus panel counts them: a republication of a wire story does not move the line.
- 24 Sept 2026, 14:15 UTC: CoinGape — 1 independent source, 1 reports
- 26 Sept 2026, 14:02 UTC: Bitcoin Insider — 2 independent sources, 3 reports
Affected entities
Also mentioned: XRP, Bitwise, VanEck, Grayscale
Original sources
| Publisher | Report | Role | Published |
|---|---|---|---|
| CoinGape Crypto media | Solana Price Prediction as Alpenglow Upgrade Moves to Public Testnet | Original | |
| CoinGape Crypto media | Solana Price Outlook Eyes $130 as Alpenglow Upgrade Targets 150ms | Independent | |
| Bitcoin Insider Aggregator | US Spot Solana ETFs Log Record $80M Daily Inflow as SOL Tops $119 | Syndicated |
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