Vitalik: Ethereum ZK Speed Race Won, Security Is Next

Speed Is Solved: EthereumETH-5.95%'s Next Big Frontier

Ethereum co-founder Vitalik Buterin declared on October 15, 2026, that the race to make zero-knowledge (ZK) proofs fast enough for Ethereum is officially over. Now, he says, developers must shift their focus entirely to security.

This statement came right after Layer-2 project ZKsyncZK+10.31% announced a major technical milestone. ZKsync showed that zero-knowledge proofs can now run in real time using just a single, standard graphics card.

What Are ZK Proofs and Why Do They Matter?

Think of zero-knowledge proofs like buying groceries. Instead of the store clerk recounting every single item in your cart at the exit, they simply scan a short digital code on your receipt that proves mathematically everything was paid for.

That is essentially what Zero-Knowledge (ZK) proofs do for blockchain networks.

Today, Ethereum validators must manually re-run every transaction in a block to check that nobody cheated. ZK proofs change that completely. They allow validators to check a short mathematical proof instead of re-executing every piece of code. This drastically cuts down the workload for validators.

The Benchmark: How Fast Is ZKsync's Airbender Prime?

ZKsync tested its new prover tool, named Airbender Prime, across 7,200 consecutive mainnet blocks. The numbers from ZKsync's self-evaluation set a new benchmark for speed:

• 99% of proofs were generated in under 10 seconds.
• The entire proving process ran on a single consumer graphics card (GPU).
• No single block in the test sample took longer than Ethereum's 12-second block time target.
• Airbender Prime took top ranking for average proving speed on ETHproofs, a public prover leaderboard.

By lowering the hardware threshold to a single GPU, ZKsync believes far more independent operators and institutions can participate in running provers.

Vitalik's Message: Security Takes Top Priority

Following ZKsync's announcement, Vitalik praised the achievement on X but emphasized that speed alone is no longer the main objective.

"At this point, I consider the battle for speed to be definitively won, and the top priority for zkEVMs should shift fully to security."

To ensure zkEVMs (systems that prove Ethereum's transaction execution) are truly ready for global scale, Vitalik outlined three critical tests:

1. Full Equivalence: The system must strictly match the official Ethereum specification.
2. Gas Cost Caps: Prover costs must be capped relative to block gas limits.
3. Sound Proof Systems: The underlying mathematics must be bulletproof.

Vitalik specifically called for formal verification. This means using mathematical proofs to verify that code is completely bug-free, rather than relying only on standard software testing.

Does Faster Proving Boost ETH's Price?

In short, not directly. Airbender Prime is a tool developed by ZKsync, rather than a direct upgrade to Ethereum's underlying consensus protocol layer.

Because of this, it does not alter Ethereum's token supply, transaction fees, or staking reward mechanics. Any market impact is more likely driven by overall community sentiment around Ethereum's tech roadmap, combined with broader market conditions and institutional fund flows.

For context, ETH dropped over 5% in price over a recent 24-hour period, serving as a clear reminder that technology updates do not protect asset prices from short-term market swings.

Past returns of digital assets do not guarantee future returns. View complete market data at bitkub.com/th/market/ETH.

Why Institutional Trust Depends on Flawless Security

Beyond raw speed metrics, the bigger stakes involve credibility. ZKsync actively pitches its infrastructure to major financial institutions and banks.

The pitch is compelling: even if a server gets hacked, an attacker cannot write an unauthorized transaction into the ledger without a valid zero-knowledge proof.

However, a super-fast prover with a hidden code flaw defeats that exact promise. Moving forward, formal verification and independent audits will determine which zkEVM solutions Ethereum can truly trust for the long haul.