Following the Optimism and Base foundation announcement, we plan to upgrade node clients to the following release.

Optimism Mainnet / Sepolia
op-geth: v1.101503.1
op-node: v1.12.1

Base Mainnet/Sepolia
op-geth: v1.101503.1
op-node: v1.12.1
op-reth: v1.3.2

For more information, you can review the tag release:
https://github.com/ethereum-optimism/op-geth/releases/tag/v1.101503.1
https://github.com/ethereum-optimism/optimism/releases/tag/op-node%2Fv1.12.1
https://github.com/paradigmxyz/reth/releases/tag/v1.3.2

During the upgrade process, please note that there will be no network downtime, however some network interruptions may occur.

If you have any concerns, questions, or need to discuss how this might impact your project specifically, please don't hesitate to reach out our support at nodit@lambda256.io

Thanks you for your patience and continued trust in our services.