Mojo🔥 is now open source
Mojo, the programming language developed by Modular, has been released as open source under an Apache 2 license. This release follows the shipping of Mojo 1.0 last week and fulfills a promise made in May 2023 to open source the compiler and toolchain. When Mojo first launched, the stated goal was to create a superset of Python, allowing existing Python code to bootstrap the ecosystem. However, that plan changed around August 2025, with the project acknowledging that Mojo may or may not evolve into a full Python superset, and that it's acceptable if it doesn't. The source notes that AI-assisted coding tools already help migrate Python to Mojo, and future tooling and ecosystem maturity are expected to make this process smoother. Today, Mojo is its own language, designed to make GPU programming as painless as possible using syntax inspired by Python, though it is not 100% compatible with existing Python code.
Mojo's open-source release makes its GPU-focused language freely available, potentially accelerating adoption among developers.