ZKsync's new prover generated validity proofs for 7,200 consecutive Ethereum blocks in under 10 seconds each, using a single consumer GPU. Vitalik Buterin says the zkEVM speed race is effectively decided. That matters because Ethereum's rollup scaling plan depends on proofs this fast and cheap to make Layer 2s trustworthy and affordable.
What actually happened
ZKsync announced Airbender Prime, its zero-knowledge prover for Ethereum, on 17 October 2026, according to Wu Blockchain. Test data show a single NVIDIA RTX PRO 6000 Blackwell GPU proved a consecutive batch of 7,200 Ethereum mainnet blocks. 99% of block proofs took under 10 seconds, and every block, including witness preparation, finished within 12 seconds. The prover uses the open RISC-V standard and hash-based STARK proofs, built for post-quantum security with a standalone verifier. Vitalik Buterin called it a decisive result for zkEVM proof speed and said the priority must now shift to security, through formal verification of arithmetic correctness, strict proof-cost limits, and audits of the proof system itself. Separately, ETH traded at $2,412, down -1.20% over 24 hours, after a high of $2,443 and a low of $2,393, with $7.64 billion in 24-hour volume.
How we got here
Proof speed has been the main zkEVM battleground for the past two years, as rival rollup teams raced to prove Ethereum blocks fast enough and cheaply enough to pass savings on to users. Buterin's post marks the first time a senior Ethereum figure has said that race is functionally decided. The same week, ENS DAO submitted a proposal to activate ENSv2 mainnet, and Lido added native ETH staking on four Layer 2 networks, Arbitrum, Base, Linea and Optimism, letting users swap ETH for wstETH without bridging back to mainnet. Ethereum's scaling roadmap has long been tied to proof performance; this week showed several pieces of that stack moving at once.
Why this matters for you
For builders, faster and cheaper proofs mean L2 fees can keep falling while security work, not speed, becomes the competitive front. Formal verification of zkEVM arithmetic is now the stated priority, which should matter to anyone trusting a rollup with funds. For stakers, Lido's four-chain integration removes a manual bridging step, making ETH staking from L2 wallets faster. For holders, ETH's price moved inside a tight band, $2,393 to $2,443, while ether ETFs saw $320 million in outflows this week, according to The Defiant. Technical progress and short-term flows are, once again, moving in different directions.
The bigger question
If proof generation keeps getting faster and cheaper, the bottleneck shifts to trust in the proof system itself. Can formal verification keep pace with zkEVM adoption, or will rollups ship speed gains faster than anyone can prove they are safe? The answer decides whether Ethereum's scaling plan delivers cheaper blockspace without quietly expanding its attack surface. Nobody in the ecosystem has given a firm timeline for when that verification work will be finished.
What to watch
Blur shuts down its trading frontend on 12 November 2026, with its Blend lending protocol halting new loans the same day. PancakeSwap's proposed fee changes, if approved, begin rolling out in November 2026 and finish by late January 2027. ENS DAO's ENSv2 proposal still needs a Snapshot vote. Watch for formal-verification updates from zkEVM teams following Buterin's post.
This article is information, not financial advice. Prices are a snapshot and change constantly. Nothing here is a recommendation to buy or sell any asset. Do your own research.
