#What is the Giga Upgrade and What Does It Aim to Achieve?
The Giga upgrade introduced by Sei Labs represents a significant leap for the Sei Network, aiming for a performance of over 200,000 transactions per second with impressive finality times below 400 milliseconds. This upgrade positions Sei in a performance category rarely explored by Layer 1 blockchains.
To put this into perspective, Ethereum typically handles between 15 to 30 transactions per second. Meanwhile, Solana, known for its high-speed transactions, has a theoretical maximum of around 65,000 TPS. However, real-world performance often falls short of these numbers.
#How Does the Giga Upgrade Improve Performance?
At the heart of the Giga upgrade lies the Autobahn consensus protocol. Traditional blockchain architectures rely on a single block proposer, which can create delays in transaction processing. The Autobahn protocol allows for multiple validators to propose blocks at the same time, effectively eliminating this bottleneck and enhancing overall transaction speed.
Sei’s recent whitepaper, released on May 19, 2025, outlines a target capacity of 5 gigagas, equating to nearly a 40 times increase from its previous limit of about 5,000 TPS. This upgrade not only includes parallel processing but also introduces asynchronous execution. This means that the order in which transactions are processed is independent of their actual execution. As a result, the network can handle multiple transactions simultaneously without waiting for each one to complete in sequence.
The development roadmap for Sei outlines three main areas of focus: execution, consensus, and storage. This strategic approach aims to significantly boost Ethereum Virtual Machine (EVM) throughput, potentially increasing it by 50 times. The network has successfully demonstrated reduced block times of approximately 400 milliseconds on its mainnet, thanks to optimizations referred to as Twin Turbo.
#What is the Timeline for the Giga Upgrade?
While Sei Labs has not confirmed a specific date for the mainnet launch of the Giga upgrade, the current expectation is that it will take place in the first half of 2026. Prior to that, the team plans to initiate testnet phases for the proposed SIP-3 migration in the first quarter of 2026.
The SIP-3 proposal aims to transition Sei into a fully EVM-compatible chain. Currently, Sei supports both EVM and CosmWasm environments. Streamlining to only EVM simplifies the development process and enhances Sei's competitiveness against Ethereum layer-2 solutions and alternative Layer 1 options. The migration is targeted for completion by mid-2026.
The Giga upgrade follows the launch of Sei version 2 in July 2024, which had already introduced capabilities for parallel execution.
#Why Does the Giga Upgrade Matter for Investors?
The existing block times of 400 milliseconds on the mainnet indicate that Sei Labs is progressing effectively rather than making empty promises. A 40 times improvement over a base of 5,000 TPS positions Sei as a serious contender compared to other platforms that often promise exaggerated capabilities.
The enhanced finality times could enable on-chain order books to compete directly with centralized exchanges, particularly in sectors such as high-frequency trading and decentralized finance.
For holders of the SEI token, the improvement timeline suggests a crucial period for investment considerations. With a testnet set for early 2026, a potential mainnet release in the first half of 2026, and the anticipated completion of the SIP-3 migration mid-2026, investors will have concrete timelines to assess the potential impact on market values.
The Giga upgrade truly represents a transformative approach to blockchain technology, offering promising advancements that could shape the future of high-performance networks.