- ArbOS Dia went live on Arbitrum One and Nova, updating gas prices to smooth out rate spikes and increasing the minimum base fee to 0.02 gwei.
- The upgrade adds key-ready secp256r1 support tailored to Ethereum’s post-Fusaka specifications and extends custom gas tokens.
Arbitrum has released the ArbOS Dia upgrade for Arbitrum One and Arbitrum Nova. The upgrade goals smoother layer-two costs, higher throughput and updated tooling.
Dia changes the way Arbitrum sets the base fee at tier two during peak demand. It replaces one gas target and one adjustment window with multiple higher objectives and longer windows. Arbitrum also increased the standard minimum base compensation from 0.01 gwei to 0.02 gwei. As CNF reportedPolygon’s EIP-1559 model adjusts reimbursements upward in the same manner.
According to the project, the higher minimum increases the cost of spam-style bot activity. It is also intended to keep reimbursements more stable as usage increases. What’s more, the pricing update focuses on lower severity, lower frequency, and shorter duration of high costs.
The ArbOS Dia upgrade is now live on Arbitrum
Flexible rates as demand increases
Basis for higher throughput
Passwords/biometrics for user onboarding
New interop gas tokens for Arbitrum chains
Ethereum Fusaka UpgradeMore information: https://t.co/QLCvXGwtPb pic.twitter.com/Y1MMexowpy
— Arbitrum (@arbitrum) January 8, 2026
Arbitrum also linked the change in the compensation curve to the network economy. The higher minimum basic amount can help to balance the balance DAO turnover as the curve becomes smoother. However, the upgrade does not change Arbitrum’s role as an Ethereum-aligned layer 2 network.
Dia also prepares the network for more throughput on similar hardware. It updates Arbitrum’s state transition function to track gas across different resource types. These include computation, storage access, storage growth, and history growth.
Arbitrum has rolled out upgrades aimed at smoother rates and higher throughput. In a similar development we have covered that VeChain users have been given a new Wanchain bridge that allows transfers of ETH, USDT and USDC to Arbitrum.
Rules for ArbOS Slide fees and onboarding updates
Dia adjusts block packing rules to reduce the number of skipped transactions under load. A new limit per transaction allows the last transaction to use a maximum of MaxTxGasLimit. It may slightly exceed the previous MaxBlockGasLimit, while keeping the overall targets unchanged.
For app teams, Dia updates support for secp256r1 to match signing with a passkey Ethereum‘S planned post-Fusaka behavior. Developers can build onboarding with passkeys, facial ID or fingerprint prompts, and device-protected keys. The update also supports recovery flows and enterprise authentication layers.
Additionally, Dia adds more flexibility for native gas tokens on custom Arbitrum chains via Native Token Mint/Burn. This allows a chain to delegate mining and burning to a trusted bridge provider. Supported standards include LayerZero OFTs, xERC20s, native USDC, and native USDT, also known as USDT0. However, this feature is not available on Arbitrum One.
Dia also brings select EVM changes from the Fusaka era to Arbitrum chains. These include updated secp256r1 semantics, the CLZ opcode, ModExp repricing, and BLS12-381 curve operations. On the node side, it adds support for the eth_config RPC method and applies related network and history updates where relevant.
The rollout sets the stage for smoother pricing, single-key onboarding, and broader gas-token interoperability on custom chains. At the time of reporting, ARB was trading on $0.208upwards 4.28% during the past 7 days.