Immutable targets 2027 OP Stack migration with faster blocks and longer native withdrawals

Immutable announced on 6 November that it plans to move its gaming chain to the OP Stack around mid-2027. Blocks would arrive every second instead of every two seconds, while native withdrawals would take roughly seven days.

The company says accounts, balances, contracts, approvals and the chain identifier will carry over. Most users and developers should not need to act. The migration itself is expected to interrupt block production for several hours; an exact date has not been announced.

The proposed design would make Immutable an Ethereum rollup, with transaction data availability on Ethereum and withdrawals verified against posted state commitments. Immutable says it will begin with permissioned fault proofs before introducing zero-knowledge validity proofs.

Faster block production and faster withdrawal settlement are different measures. Immutable expects slightly higher transaction costs and says faster liquidity bridges will probably remain widely used. Those bridges are separate from the native route described in the seven-day estimate. These are planned changes, not performance already delivered.