Sei Network Reveals Giga Roadmap: Targeting 200,000 TPS and 400ms Finality

The high-performance Layer-1 blockchain Sei has officially unveiled the roadmap for its next-generation protocol upgrade, "Giga." This comprehensive overhaul is designed to transform the network's efficiency by fundamentally refactoring its execution client, state management, and consensus mechanism. By introducing these architectural improvements, Sei aims to achieve a throughput of 200,000 transactions per second (TPS) and a finality time of just 400 milliseconds, positioning itself as a leading infrastructure for high-frequency trading and institutional-grade decentralized finance (DeFi).

Ares Execution and Eidos State Management

The Giga upgrade introduces the Ares execution client, which utilizes pipelined execution and asynchronous processing to eliminate traditional performance bottlenecks. This technical evolution allows the network to process multiple transaction stages simultaneously, significantly increasing the overall speed of the blockchain. Pipelining is a method where different parts of a transaction are handled by different hardware resources at the same time, much like an assembly line.

Parallel to the execution improvements, the Eidos state management system will replace traditional Merkle trees with a flat key-value store. This transition is expected to optimize data access by:

• Separating "hot" data (frequently accessed) from "cold" archives.
• Reducing the computational overhead required for state proofs.
• Increasing the efficiency of data retrieval for validators.

Autobahn Consensus and the Shift to Pure EVM

At the core of the Giga upgrade is the Autobahn consensus mechanism, which has already demonstrated a processing capacity of 5 Gigagas on internal distributed testnets. This mechanism enables multi-proposer block production, allowing multiple validators to propose blocks in parallel rather than waiting for a single leader. This breakthrough is the primary driver behind the network's target of 400ms finality.

Additionally, Sei is implementing SIP-3, a strategic proposal to transition the network to a pure Ethereum Virtual Machine (EVM) architecture. This move involves the gradual deprecation of the Cosmos SDK and CosmWasm, effectively streamlining the codebase by removing hundreds of thousands of lines of code. To protect users during this transition, the roadmap also includes the Sedna private mempool, which introduces a cryptographic transaction propagation mechanism to mitigate front-running and MEV-related risks.

To make something faster, you either have to increase power or reduce weight. To be much faster, you do both. SIP-3 is the weight reduction, removing hundreds of thousands of lines of code.

The Giga upgrade represents a pivotal shift for the Sei ecosystem, moving away from its original dual-architecture toward a highly specialized, high-throughput EVM environment. With these milestones, Sei seeks to provide Web2-level performance for on-chain applications, catering to the growing demand for speed and scalability in the 2026 digital asset market.