opBNB Mainnet Hard Fork Halves Block Time to 250 Milliseconds

The evidence overwhelmingly supports the truthfulness of the statement. The most authoritative sources, direct posts from Binance founder Changpeng Zhao (CZ), explicitly confirm that the 'opBNB Fourier Mainnet hardfork' is live and has reduced the block time to 250 milliseconds. One post even references the specific pull request for the change, providing a high degree of technical verification.This primary confirmation is consistently corroborated by multiple secondary sources, including crypto news outlets like Cryptopolitan, TradersUnion, and Phemex, as well as information feeds on platforms like Coinpaprika. These sources all report the same key facts: the 'Fourier' hard fork on the opBNB mainnet resulted in a new block time of 250ms.There are minor inconsistencies in the provided data, but they do not undermine the core claim. Two sources mention a 'January 2026' date, which directly conflicts with CZ's announcement that the hard fork is already live; this is almost certainly a typographical error in those summaries. Another source mentions a different, upcoming 'Fermi' hard fork, which is irrelevant to the 'Fourier' hard fork that has already occurred. An irrelevant source discussing a different blockchain's block time was disregarded. Given the direct, unambiguous confirmation from the highest authority source (the project's founder) and the widespread, consistent reporting across multiple other sources, the statement is assessed as highly likely to be true.