Ethereum's Fusaka Upgrade Arrives in December: What to Expect
Briefly

Ethereum's Fusaka Upgrade Arrives in December: What to Expect
"The past year showed Ethereum's resilience through multiple corrections. Started November 2024 at $2,650, ETH rebounded fast when the SEC approved spot Ethereum ETFs. That approval triggered big inflows and steady demand. It also set up a strong 2025 rally. By August 2025, Ethereum hit a new all-time high of $4,950 (That's 86% up from the start of the year). The spike reflected more on-chain activity, growing staking participation, and optimism about the network's scaling roadmap."
"The upgrade activates at slot 13,164,544 after months of testing on Holesky, Sepolia, and Hoodi testnets. Fusaka caps per-transaction gas at 16.78 million units. This will prevent any single transaction from eating an entire block, improve network performance, and reduce denial-of-service risks. Ethereum's overall block gas limit will rise to 60 million units (this enables more transactions to run in parallel). It'll boost Ethereum's capacity and throughput, making it faster and more reliable for institutional apps."
Fusaka will activate Dec. 3, 2025 at slot 13,164,544 after testing on Holesky, Sepolia, and Hoodi testnets. The upgrade caps per-transaction gas at 16.78 million units and raises the overall block gas limit to 60 million units. Those limits will prevent single transactions from consuming entire blocks, lower denial-of-service risks, and allow more transactions to run in parallel. Expected outcomes include higher throughput, lower gas costs, smoother transactions, improved validator performance, and accelerated Layer 2 growth. Market sentiment turned positive in 2025 after spot ETH ETF approval, driving an all-time high and increased on-chain activity.
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