Unichain is Upgrading to OP Enterprise Unichain is moving to OP Enterprise, ahead of native interoperability across the OP Stack. October 09, 2026 #Unichain
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Unichain is set to move its testnet to OP Enterprise on October 13, with mainnet migration planned for late October. The transition is framed around preparing for native interoperability across OP Stack chains, while chain ID, contracts, balances, apps, and Uniswap v2, v3, and v4 deployments remain unchanged.
Key claims & sources
What it means
Users and developers on Unichain will notice the upgrade timing first, since the testnet shifts on October 13 and the mainnet follows later in October. The same setup is meant to carry over for chain ID, contracts, balances, and apps, so day-to-day references to the network are not changing immediately.
In practice, the change is about where Unichain sits inside the OP Stack rather than a reset of the network itself. The existing Uniswap v2, v3, and v4 deployments stay on Unichain, and the move is presented as preparing the chain for native interoperability.
Market reaction i
Coverage timeline
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