Activation Time: 2025-10-14 07:36:00 UTC
The Fusaka upgrade will activate on Ethereum Sepolia L1 at the time above.
Action required:
If you or your partners operate an external OP L2 testnet node, you must upgrade op-node and op-geth to the versions specified in the official notice:
https://docs.optimism.io/notices/fusaka-notice#for-node-operators
Nodes not upgraded correctly will stop syncing after activation.
No action required if you:
Use Conduit RPC directly, or
Operate a Base L3 testnet - do not upgrade because the latest version does not support this configuration
Reach-out Conduit Support Team if you encounter any issue.
Scheduled
Activation Time: 2025-10-14 07:36:00 UTC
The Fusaka upgrade will activate on Ethereum Sepolia L1 at the time above.
Action required:
If you or your partners operate an external OP L2 testnet node, you must upgrade op-node and op-geth to the versions specified in the official notice:
https://docs.optimism.io/notices/fusaka-notice#for-node-operators
Nodes not upgraded correctly will stop syncing after activation.
No action required if you:
Use Conduit RPC directly, or
Operate a Base L3 testnet - do not upgrade because the latest version does not support this configuration
Reach-out Conduit Support Team if you encounter any issue.