Modular has released the Mojo programming language and its compiler under an Apache 2 licence. This follows the shipping of version 1.0 last week and ends a four-year wait since May 2023 when the company first promised an open source release.
The initial plan was to create a superset of Python so existing code could bootstrap the ecosystem. That strategy changed around August 2025 when the team acknowledged Mojo might not become a full superset. The language is now its own entity, designed to make GPU programming easier using syntax inspired by Python without guaranteeing 100% compatibility with existing code.
* The compiler and toolchain are now available to the public.
* The project shifted from a strict Python superset to a distinct language.
* AI-assisted tools are currently helping developers migrate Python code to Mojo.
