Ethereum is moving one step closer to a significant milestone. The Fusaka upgrade has entered its final testnet phase as developers gear up for the official mainnet rollout scheduled for December 3. This upgrade brings a key technical change: the introduction of a gas cap per transaction, which is expected to make block usage more efficient.
The testnet phase is crucial for identifying and fixing any bugs before the upgrade goes live on the Ethereum mainnet. Ethereum developers and node operators are now working to ensure that all systems run smoothly ahead of the scheduled launch.
Why the Gas Cap Matters
One of the main goals of the Fusaka upgrade is to optimize Ethereum’s block space usage. By setting a gas limit on individual transactions, blocks will be better balanced, reducing the chance of a single transaction consuming excessive resources. This change also lays the groundwork for parallel execution, a future development that could significantly enhance Ethereum’s throughput and scalability.
In simpler terms, Fusaka is a step toward making Ethereum faster and more efficient for everyone—from individual users to large-scale applications.
UPDATE: Ethereum's Fusaka upgrade enters final testnet phase ahead of Dec. 3 mainnet rollout.
— Cointelegraph (@Cointelegraph) October 22, 2025
The upgrade introduces a gas cap per transaction to improve block efficiency and prepare the network for parallel execution. pic.twitter.com/JA4gnDrFyA
Preparing for the Future of Ethereum
The Ethereum roadmap has always aimed at long-term scalability and usability. Fusaka fits right into this vision by introducing features that not only benefit the network today but also prepare it for bigger changes tomorrow.
With the final testnet now active, the Ethereum community is watching closely as developers fine-tune the upgrade. If all goes according to plan, the December 3 mainnet release will mark another major achievement in Ethereum’s evolution.