Sei Network Approves SIP-6, With Autobahn Mainnet Still Ahead

Sei Network approved SIP-6, advancing the Autobahn consensus upgrade within Sei Giga and clearing a governance hurdle on the path to mainnet. The vote does not activate the upgrade: a public testnet, audits and other rollout work remain, and no mainnet date has been announced.

SIP-6 changes how blocks are assembled. Each active validator would keep a separate lane for proposed transactions, allowing validators to package activity concurrently instead of routing it through one producer. Stake weight determines which validator takes the next turn coordinating references to certified batches. The proposal has transaction ordering, data availability and execution proceed in overlapping stages.

The design is intended to spread transaction packaging across active validators and use their combined bandwidth, while reducing reliance on one block producer for transaction inclusion and sequencing. Its intended uses include onchain trading functions such as placing and canceling orders and updating prices. These are goals for the upgrade, not functions that the approval itself activates on mainnet.

Staked participation stood at 46.63% as of Nov. 3, when SIP-6 cleared quorum, exceeding the proposal’s 33.4% participation requirement.

Autobahn is the consensus component of Sei Giga. The broader overhaul also tracks SIP-3, which moves Sei toward an Ethereum Virtual Machine (EVM)-only stack, Eidos for storage and Ares for execution. Sei published an earlier draft of the Autobahn plan on Oct. 28. Approval of SIP-6 clears a governance step for the consensus upgrade but does not establish that the other work is complete.

Sei’s rollout plan lists completion of SIP-3, independent audits, rehearsals and test results before mainnet activation, and also calls for a public testnet. The roadmap gives that testnet a target of 200,000 transactions per second and 400-millisecond finality. Those figures are separate from the under-250-millisecond ordering time recorded in an internal development-network test; SIP-6 does not reconcile the measurements. The roadmap has described Autobahn mainnet as coming soon, without giving a launch date.