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The community asked for three years. It took a $3.9B acquisition to make it happen. On August 18, Modular open-sourced the entire Mojo compiler and toolchain under Apache 2.0 (with LLVM exceptions) — one week after Mojo 1.0 hit source stability, and three weeks after Qualcomm closed its acquisition of Modular on July 29.

What actually changed

Mojo is Chris Lattner’s AI programming language: Python-compatible syntax, systems-level performance, targeting CPUs, NVIDIA and AMD GPUs, TPUs, and Qualcomm accelerators. The standard library and kernel code were already open — but the compiler stayed closed, which is why skeptics kept calling Mojo “open source someday.” Now you can clone the repo and build with one Bazel command, or grab prebuilt binaries. One catch: external contributions to the compiler won’t open until later in 2026.

Why Qualcomm gave it away

Qualcomm sells inference silicon, not CUDA. Every developer locked into NVIDIA’s stack is a lost customer. Open-sourcing the toolchain costs Qualcomm nothing and buys Mojo a shot at becoming CUDA’s real alternative. The market noticed: 268 GitHub stars in one day, 28k+ total, 358 points on HN.

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