Base Activates Beryl Upgrade June 25, Launches B20 Token Standard with Faster Withdrawals

Base activates the Beryl upgrade on mainnet on June 25, 2026, at 18:00 UTC, introducing B20, a native token standard built directly into node software rather than deployed as a smart contract. B20 operates as a superset of the ERC-20 standard, maintaining compatibility with existing wallets and exchanges while running as Rust precompiles to lower transaction costs and increase throughput.

Beryl reduces the single-proof withdrawal finalization window from 7 days to 5 days and deploys Reth V2, an updated execution client that cuts node disk usage by roughly half and raises throughput by approximately 33 percent. The upgrade ships with built-in compliance tools including role-based permissions, supply caps, and token-freezing capabilities for regulated asset issuers.