Base, the Coinbase-incubated Ethereum Layer 2 network, is adding ZK proofs from Succinct Labs for faster finality and stronger onchain verification.
Succinct Labs said its SP1 zero-knowledge virtual machine will support Base’s proof infrastructure as the network moves to a hybrid system using trusted execution environments, or TEEs, and ZK proofs.
The integration is part of a broader Base upgrade, Azul, which Base has described as its first independent network upgrade. The upgrade is targeting mainnet activation on May 13, 2026, after testnet deployment and a security review process.
Base is one of the largest Ethereum Layer 2 networks by value secured and user activity. L2BEAT tracks Ethereum scaling networks by total value secured and classifies rollups by whether state commitments are validated through validity proofs or accepted optimistically and later challenged through fraud proofs.
Base is an Optimistic Rollup built with the OP Stack.
That model assumes transactions are valid unless challenged during a dispute window. It helped Ethereum scale quickly, but it also created long withdrawal periods and left users dependent on economic incentives, watchers and challenge mechanisms.
ZK proofs change that model.
Instead of waiting days for fraud challenges, a rollup can submit a cryptographic proof that its state transition was valid. That can reduce withdrawal times and make bridging capital back to Ethereum less dependent on manual intervention or game-theoretic dispute resolution.
“Base going with SP1 is the single largest vote of confidence that ZK is indeed the endgame for Ethereum scaling,” said Brian Trunzo, Chief Growth Officer at Succinct Labs. “With Succinct, Base users inherit Ethereum-grade security, replacing economic game theory with math. Blockchains have always been as much about trust as decentralization, and ZK offers a compelling way for institutions to balance both.”
The phrase “replacing economic game theory with math” is the key claim.
Optimistic rollups rely on the possibility that invalid state updates will be detected and disputed. ZK systems aim to make invalid updates impossible to finalize unless a proof verifies. That is a different security assumption.
Base’s Azul design does not appear to move immediately to a pure ZK rollup.
Instead, it uses a multiproof model that combines TEE proofs and ZK proofs. Base says ZK proofs will be permissionless and can override permissioned TEE proofs if the two systems contradict each other. The design is meant to improve security depth while supporting faster withdrawals and capital efficiency.
Wilson Cussak, Head of Base Chain, framed the change as a response to Base’s growth.
“Base is built to be the home for everyone onchain. As the network has grown, so has the need to keep strengthening the infrastructure that users and developers rely on every day,” Cussak said. “Expanding Base with ZK proofs is a meaningful step to deepen the network’s security and resiliency.”
The upgrade also gives Base a more independent technical direction.
Base Azul replaces Optimistic fault proofs with a dual-proof system, while also consolidating client architecture around Base-specific execution and consensus components, according to Immunefi’s audit competition scope for the upgrade.
It’s important because Base’s scale has made it a systemic part of Ethereum’s L2 economy.
If a smaller rollup experiments with ZK finality, the result is mostly a technical milestone. If Base does it, the market signal is stronger because applications, developers, stablecoins and consumer-facing activity are already concentrated there.
The practical benefit is withdrawals.
Optimistic rollups have historically carried multi-day exit periods because Ethereum needs time for fraud proofs to be submitted. Base’s multiproof system is designed to reduce withdrawals to about one day when TEE and ZK proofs agree, while preserving fallback mechanisms if they do not.
That could improve capital efficiency for traders, market makers, payments applications and DeFi protocols.
A seven-day withdrawal delay is manageable for long-term users. It is more costly for institutions, liquidity providers and applications that need to rebalance capital across venues quickly.
The move also reflects a larger convergence in Ethereum scaling.
Optimism said in February that it had partnered with Succinct as a preferred ZK proving provider for the Superchain. After ZK proofs go live on OP Mainnet, OP Stack chains are expected to be able to upgrade to ZK validity proofs with faster finality and cryptographic security.
Mantle is another OP Stack Layer 2 that launched as a ZK validity rollup powered by Succinct’s SP1 zkVM.
Polygon previously used SP1 for parts of AggLayer’s proof infrastructure, saying the zkVM helped reduce developer time for ZK components.
These efforts point in the same direction.
Ethereum’s largest scaling systems are trying to retain the developer familiarity of optimistic infrastructure while adding validity proofs where security and finality matter most.
Succinct’s pitch is that SP1 makes that transition easier.
SP1 is an open-source zkVM that proves the correct execution of programs compiled for the RISC-V architecture. In practice, that means developers can write or adapt Rust-based software and generate ZK proofs without building a custom proving system from scratch.
Succinct has also claimed performance progress in real-time proving.
In November 2025, the company said SP1 Hypercube proved 99.7% of sampled Ethereum L1 blocks in under 12 seconds using 16 Nvidia RTX 5090 GPUs, a benchmark it framed as progress toward real-time Ethereum proving.
That remains a benchmark, not a guarantee of production performance across every rollup workload.
But the direction is clear. ZK proving is moving from research into live infrastructure decisions.
Ethereum co-founder Vitalik Buterin has pushed a similar roadmap. In a January 2025 post, he argued for Stage 2 rollups using multiple proving systems and formal verification as part of Ethereum’s scaling future.
Base’s approach mirrors that logic.
It does not rely only on one proof system. It adds redundancy through TEEs and ZK proofs, while allowing ZK proofs to act as a permissionless check against the TEE layer.
The risk is complexity.
Hybrid systems add more components, more verifier logic and more edge cases. That is why the Base Azul audit competition is significant. Immunefi said Base and Immunefi launched a security competition with up to $250,000 in rewards, running from April 21 to May 4, 2026, ahead of mainnet deployment.
The upgrade will need to prove itself in production.
ZK systems can improve security assumptions, but they also introduce proving costs, implementation risk and dependencies on specialized infrastructure. TEEs offer speed and efficiency, but they involve hardware trust assumptions. The point of multiproofs is to avoid making either system the only line of defense.
The change should be mostly invisible for end-users. Apps and developer tools are expected to keep working as before. The more important shift is underneath the user experience: Base is trying to move more of its trust model from dispute windows and operator processes toward cryptographic verification.
That is why this integration matters. Base is not simply adding a new cryptography vendor. It is adopting the security architecture that much of Ethereum’s roadmap has been moving toward for years.
The test is whether ZK can now secure the biggest consumer-facing rollups without degrading reliability or cost.
The success of Base’s ZK deployment may accelerate a wider migration among optimistic rollups. Ethereum’s L2 market would then look less like a competition between optimistic and ZK systems, and more like a convergence around ZK-backed finality.
And that would mark a major shift for Ethereum.
ZK would no longer be only the long-term scaling “endgame.” It would become part of the operating stack for networks already carrying billions of dollars in capital.
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