ZKsync’s Airbender hits real-time proving on one GPU, and Vitalik Buterin weighs in

Ethereum's co-founder praised the speed milestone but says the next fight is over security, correctness and prover cost bounds ZKsync says it has built the first Ethereum prover that can generate proofs in real time on a single GPU. Ethereum co-founder Vitalik Buterin responded two days later with praise, and with homework. The system is called Airbender Prime, and ZKsync announced it on October 13, 2026. Buterin publicly commended the team on October 15, 2026. He also argued that the focus should now move toward verifying zkEVM security, including system correctness and limits on how much proving can cost.

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