For developers, this marks the first time they can audit, modify, and rebuild the entire OS from source. For security researchers, it’s an invitation to verify the system’s zero-trust architecture. And for the open-source community, June 10, 2025, is the day OpenOS truly became free.
On June 10, 2025, the development team behind the OpenOS kernel reached a historic milestone: the full public release of its source code alongside version 4.0 of the operating system. operating system version released source code june 10 2025
Unlike previous iterations, which shipped only as compiled binaries with proprietary drivers, version 4.0 strips away those barriers. Every line of code—from the memory allocator to the new real-time scheduler—is now available under the GPLv3 license. The release package, timestamped 2025-06-10, includes the core kernel, device drivers, and the newly documented system call interface. For developers, this marks the first time they