Optimism to Launch Superchain Upgrade 16a on October 2
Optimism deploys Superchain Upgrade 16a on Oct 2 on Superchain Mainnet, subject to governance approval. The upgrade is designed to improve network stability and flexibility, completing the transition from U16.
Refer to the official tweet by OP:
Optimism@OptimismSep 19, 2025Pending governance approval, Superchain Upgrade 16a will be proposed for execution soon:
📍 Sep 22 → Superchain Sepolia
📍 Oct 2 → Superchain Mainnet
This is a maintenance upgrade replacing U16 with a safer, more flexible approach.
Let’s unpack what’s changing (and what’s… pic.twitter.com/vkM5E0aD5B
OP Info
Optimism is a Layer 2 (L2) solution designed to enhance the speed and scalability of the Ethereum network. The project aims to improve performance and transaction speed on Ethereum while reducing costs. Optimism utilizes optimistic rollups technology.
Optimistic rollups are a second-layer technology that operates on top of the Ethereum mainnet and significantly increases its throughput capacity. These rollups enable the bundling of multiple transactions into a single block, which is then confirmed on the Ethereum mainnet. This approach greatly accelerates transaction processing and reduces costs since a larger number of transactions can be processed simultaneously.
The Optimism system is compatible with standard Ethereum development tools such as Solidity and the Ethereum Virtual Machine (EVM), making it easy for developers to migrate their applications to this platform.
OP is the native governance token. The token can be used to participate in project governance within the Optimism Collective community and to vote on protocol upgrades and fund distribution.