Sei's SIP-6 proposal to adopt Autobahn consensus has cleared quorum in a tokenholder vote that closes Thursday, Nov. 5, at 4:09 p.m. ET. The upgrade would let validators propose transactions simultaneously, reducing traders' dependence on one block builder for inclusion.
The governance record lists the ballot as proposal 129, titled 'Autobahn upgrade.' Its live tally on Nov. 3 showed about 1.906 billion SEI in voting weight backing the change, 4,751 SEI abstaining and zero votes against or with veto.
Participation amounted to approximately 46.63% of bonded SEI, according to The Defiant's calculation using the tally and the staking pool, above the network's 33.4% quorum requirement. The vote remains open; approval would not immediately activate the upgrade.
Sei urged holders to 'Vote now on SIP-6' in its Nov. 3 announcement.
https://x.com/i/status/2117582204104843321
Changing Who Builds Blocks
Today, one validator builds each Sei block. Under SIP-6, every active validator would operate its own transaction lane. A rotating, stake-weighted leader would coordinate agreement on batches from those lanes rather than distribute all transaction data itself.
A deterministic rule would merge transactions into a common order, prioritizing higher tips while respecting each sender's transaction sequence. Concurrent lanes would allow validators' bandwidth to contribute together.
Sending a transaction through multiple validators is intended to reduce dependence on any one proposer. But the proposal explicitly describes resistance to censorship, not immunity: a malicious lane owner could exclude transactions sent only to it, and a malicious consensus leader could temporarily delay a lane. It also says Autobahn does not eliminate MEV, the value extracted through transaction ordering.
Sei's technical documentation reports ordering finality below 250 milliseconds on an internal devnet of 40 nodes across 20 regions. That fixes transactions' positions, not their completed execution or certified results. The documentation separately identifies 200,000 transactions per second as a public-testnet target; SIP-6 makes no fixed throughput or latency guarantee.
Giga's Order-Book Pitch
In its Giga Manifesto, published Nov. 3, Sei pitches the wider upgrade as infrastructure for tokenized stocks trading on fully onchain order books, where orders and cancellations must arrive quickly.
Giga spans execution, storage and consensus. Sei says the first Ares execution and Eidos storage components are already live on mainnet, while Autobahn has so far run only on internal test networks.
A public testnet remains ahead. Before activation, SIP-6 requires multiple independent security audits, resolution of all critical and high-severity findings, published validator hardware and bandwidth requirements, and a rehearsal against existing chain state. Activation must follow a governance-authorized software upgrade process.