No — Berkeley Mono isn’t listed as a free font. U.S. Graphics Company releases it, so licence options and pricing sit on their site.
Berkeley Mono is a monospace typeface from U.S. Graphics Company.
Berkeley Mono™ is a love letter to the golden era of computing. The era that gave rise to a generation of people who celebrated automation and reveled in the joy of computing, when transistors replaced cogs, and machine-readable typefaces were developed, for when humans and machines truly interfaced on an unprecedented scale.
A1 features 7 websites using Berkeley Mono, including Galaxy, Interfaces, and Linear. They lean towards Dark, Animated, and Minimal design styles, and they’re most often built with Next.js and Framer.