Sei Completes v6.6 Mainnet Upgrade, Activates Two Giga Plan Releases
Sei has completed the v6.6 mainnet upgrade and described it as the biggest version release in the roughly two years since EVM support was added in May 2024. Two of the three major upgrades under the Giga plan are now officially live. The Ares upgrade is running, with the v2 executor being gradually retired. The Eidos upgrade is also active, separating two years of on-chain state by moving EVM historical data into an independent database, so it no longer shares Cosmos state. The upgrade fixes more than 30 issues and optimizes node synchronization efficiency, consensus timeout parameters, error-prone configuration items, and data pruning. Developer-facing improvements include better receipt generation, JSON-RPC error handling, and historical call tracing.








