On December 3, 2025, Ethereum reached a major milestone with the activation of Fusaka, its most ambitious update in years. Promising increased scalability, reduced fees and improved user experience, this technical development is generating enthusiasm among investors and developers. Deciphering an event that could redefine the future of crypto.
In brief
- Fusaka is now active on Ethereum this December 3, successfully deployed to increase rollup capacity by 8x and reduce transaction costs.
- Fusaka improvements include PeerDAS, increased gas limit and passkey signatures, optimizing scalability and user experience.
- Ethereum Fusaka could strengthen the adoption of ETH and influence its price, with expected impacts on Layer 2 and the crypto ecosystem.
Ethereum Fusaka is finally here: a look back at a historic day
The Fusaka update was successfully deployed on December 3, 2025 at 9:49 p.m. UTC, marking a turning point for Ethereum. After months of testing and anticipation, the crypto community followed its activation live on social networks and via a YouTube live organized by Vitalik Buterin's teams. Unlike some past updates, Fusaka deployed in just 15 minutes, with no major network disruption, demonstrating the growing maturity of the ecosystem.
This update has a symbolic name, Fusaka, which merges Fulu (consensus layer) and Osaka (execution layer), in homage to Devcon 2025 organized in Japan. The developers highlighted the importance of this step, which is part of Ethereum's long-term roadmap. The validators, prepared for weeks, quickly adopted the new parameters, confirming the robustness of the protocol. For many, this seamless activation reflects the progress made since the move to proof of stake (PoS) in 2022.
Fusaka: improvements available after the Ethereum update
The Ethereum Fusaka Update introduces major changes, starting with PeerDAS (Peer Data Availability Sampling)! A technology, which allows validators to verify data by sampling small fragments rather than entire blocks. Result: the processing capacity of rollups (Layer 2) is multiplied by 8, while reducing storage costs by 80%. A crucial step forward for solutions like Arbitrum or Optimism, which depend on the efficiency of Ethereum.
The gas limit per block has also been increased to 60 million, improving Layer 1 throughput and reducing fees for end users. Another new feature: the integration of passkey signatures, such as Face ID or Touch ID, simplifying access to decentralized applications. Ethereum, however, invited the community to monitor the network for 24 hours for possible anomalies, demonstrating a cautious but confident approach.
These concrete improvements meet the expectations of users, tired of high fees and limited scalability.
ETH ready to explode?
The question on investors' lips: Can Fusaka propel the price of ETH to new heights? In the short term, major updates are often followed by an effect “buy the rumor, sell the news”but analysts remain optimistic for 2026. Reducing fees and increasing throughput could attract more users and institutions, supporting increased demand.
Some experts predict a return to around $3,500 or more if adoption follows. Rollups, now more efficient, should benefit from an influx of DeFi projects, NFTs and blockchain games, strengthening the utility of Ethereum. Faced with competitors, this update also confirms Ethereum's ability to innovate without sacrificing its decentralization. A strong argument for long-term investors.
Fusaka marks a turning point for Ethereum, combining technical innovations and long-term vision. While the community monitors the first effects, one question remains: will this update be enough to sustainably revive ETH? Between technological optimism and financial prudence… Do you think Fusaka will be a game changer for crypto?
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