According to Odaily Planet Daily, Udi Wertheimer, founder of Taproot Wizards, announced on the X platform that OP_CAT (i.e. BIP-420) has been launched on the Bitcoin Signet test network. Signet is a Bitcoin test network designed for developers to test software. It has no miners, no proof of work, and creates a block every 10 minutes on average.
Earlier news, Bitcoin Improvement Proposal BIP-420 has officially introduced the restoration of the OP_CAT opcode, which aims to enable Bitcoin covenants and support the development of smart contracts, security bridges, and on-chain transactions. The BIP-420 proposal was written by Ethan Heilman and Armin Sabouri, and aims to reintroduce OP_CAT into Bitcoin through a backward-compatible soft fork by "redefining the opcode OP_SUCCESS126."