Ethereum’s Fusaka upgrade set for Dec 3 mainnet launch after final Hoodi test, bringing key scalability and efficiency updates.
Ethereum’s upcoming Fusaka upgrade has completed testing on all three major testnets, with the final trial running on the Hoodi network.
Developers confirmed that the mainnet activation is now expected to take place on December 3. The update brings multiple improvements aimed at increasing scalability and reducing network costs, preparing the blockchain for broader adoption and future upgrades.
Final Testnet Hoodi Confirms Readiness for Mainnet
The Fusaka upgrade completed its last test on the Hoodi testnet on October 28 at around 18:53 UTC. This marks the third and final testnet run, following earlier successful upgrades on Sepolia and Holesky.
These simulations allowed developers to monitor and resolve issues in a safe environment before deployment on Ethereum’s mainnet.
Hoodi’s successful upgrade means that the network is now ready for the mainnet launch. Ethereum developers have agreed that the update will go live at least 30 days after the final test.
Based on developer discussions, the target date for Fusaka’s mainnet activation is now set for December 3, though it has not been officially finalized.
Nethermind, a key validator client, confirmed a smooth transition on its platform. The group posted, “Another smooth upgrade, another key milestone on the road to Fusaka,” on X following the Hoodi test.
🚀 The @ethereum 𝗛𝗼𝗼𝗱𝗶 𝗙𝗼𝗿𝗸 has been successfully completed and is now running seamlessly on the 𝗡𝗲𝘁𝗵𝗲𝗿𝗺𝗶𝗻𝗱 𝗖𝗹𝗶𝗲𝗻𝘁.
Another smooth upgrade, another key milestone on the road to Fusaka.
Big thanks to everyone in the ecosystem who helped make it happen -… pic.twitter.com/TEze2vgCx7
— Nethermind (@NethermindEth) October 28, 2025
This successful upgrade marks progress toward Ethereum’s roadmap of improving performance while maintaining decentralization.
Key Features Included in the Fusaka Upgrade
The Fusaka hard fork introduces several Ethereum Improvement Proposals (EIPs), aiming to improve both scalability and security.
One of the main additions is EIP-7594, also known as Peer Data Availability Sampling or PeerDAS. This allows validators to access only parts of data, not full blobs, reducing bandwidth usage and improving efficiency.
Other proposals include EIP-7825 and EIP-7935, which help increase the gas limit and optimize performance. These updates will support the future introduction of parallel execution, which will allow the network to process multiple smart contracts at the same time.
Additional EIPs are also focused on supporting zero-knowledge rollups. These are seen as essential for scaling ETH by allowing faster and cheaper transactions while keeping user data secure.
Together, these upgrades are expected to reduce costs for users and developers and prepare the network for increased demand.
Developers Prepare for the Next Upgrade After Fusaka
The Fusaka fork follows Ethereum’s Pectra upgrade, which went live about six months ago and focused on staking and wallet improvements. Fusaka continues to push forward the roadmap by increasing the network’s capacity to handle more users and applications.
Once Fusaka is live, development will shift toward the next planned hard fork, known as Glamsterdam.
Developers say this update could include proposals that work on proposer-builder separation. This is a feature that separates transaction building from block proposing to improve network fairness.
Ethereum’s next major upgrade, Fusaka, is now live on the Hoodi network! ✅
Fusaka mainnet activation is scheduled for December 3rd.
Fusaka introduces multiple EIPs to improve scalability, strengthen security, and reduce costs. The upgrade will unlock the next phase of rollup… pic.twitter.com/VQkosIouZQ
— Consensys.eth (@Consensys) October 28, 2025
The current upgrades, including Fusaka and upcoming ones like Glamsterdam, are all part of Ethereum’s “Surge” phase. This roadmap phase aims to increase the network’s scalability while maintaining security and decentralization.
Developers have stated that future updates will continue building on this foundation to handle higher transaction volumes across the network.
