The BNB Chain activates the Fermi upgrade on Wednesday to shorten block times. The fork cuts BNB Smart Chain blocks from 0.75 to 0.45 seconds and targets finality near one second, as stated in the documentation.
Validators will produce blocks every 0.45 seconds under the new rules. The upgrade tightens consensus, propagation, and voting parameters to keep validators synchronized.
The change aims to benefit latency-sensitive uses such as onchain trading, realtime DeFi protocols, and interactive gaming. Most DApps need no code edits, though teams depending on precise block timing should reassess assumptions (Nina Rong said the goal is “faster without compromising reliability”).
BNB Chain designed Fermi after episodes of congestion and degraded user experience. The team cited prior optimization work and tighter fast-finality voting to reduce delays, as described in a blog about traffic spikes at the BNB Chain blog.
The network ranked among the busiest chains in 2025, second only to Solana by transaction count, with about 3.89 billion transactions according to data. By contrast, the Ethereum base layer averages roughly 12 seconds per block, according to market data.
Fermi also forms part of BNB Chain’s 2026 tech roadmap, which prioritizes predictable latency and high-performance infrastructure. (Ed. note: finality timing is a target and may vary with network conditions.)
