What Actually is Sei Network's “Giga” Upgrade?
Sei Network’s (@SeiNetwork) Giga upgrade is a major overhaul designed to make the network faster, more scalable and better suited for high-performance onchain trading.
Put simply, Giga is rebuilding three critical parts of the blockchain: consensus, execution and storage.
(1) The first track focuses on consensus, with upgrades such as Autobahn designed to improve how Sei validators agree on the state of the chain.
(2) The Ares upgrade targets execution, the part of the blockchain responsible for actually processing transactions.
(3) Eidos focuses on storage, which is becoming increasingly important as blockchain throughput rises.
Why does storage matter?
Every transaction a blockchain processes has to be recorded. If the database cannot write data as quickly as the network executes transactions, higher throughput eventually becomes meaningless.
Eidos is designed to solve that bottleneck.
(4) Sei plans to replace the traditional Merkle-tree structure used for EVM state with FlatKV, a flat key-value database where updating one piece of state requires essentially one write.
A lattice hash, or LtHash, is then used to maintain a verifiable fingerprint of the entire state without repeatedly recalculating an entire hash path.
(5) Eidos also separates live EVM state from other blockchain data.
This means transactions accessing current state no longer have to compete with historical data for the same database resources.
(6) Sei is also introducing LittDB-backed storage for blocks and receipts.
These records are written once but queried repeatedly, making them a different workload from constantly changing blockchain state.
Older historical data will eventually move away from active nodes into archival storage, allowing nodes to focus their resources on the data needed for real-time operations.
The interesting part is how Sei plans to deploy all of this.
Instead of shutting down the network and migrating the entire database at once, Eidos is designed to migrate storage while Sei continues producing blocks.
The old and new systems can run side by side during the transition, with data moved in batches and integrity checks performed throughout the process.
The first phase arrived on Sei mainnet with the v6.6 release in August 2026, beginning the separation of EVM state and introducing improvements to the pruning process.
The broader Eidos architecture, including FlatKV, LtHash, the new receipt store and off-node archival storage, is expected to arrive through subsequent releases.
Sei’s ultimate Giga target is 200,000 transactions per second. But reaching that kind of execution speed requires more than a faster transaction engine.
The blockchain also needs a storage system capable of keeping up. That is essentially what Eidos is trying to build.
Giga is not just about making Sei execute transactions faster. It is about rebuilding the infrastructure underneath that speed so the network can actually sustain it.
