Articles

Mojo Open-Sourced Its Compiler — and Quietly Dropped the Phrase "Superset of Python"

On 2026-08-18, Modular open-sourced the Mojo compiler and full toolchain under Apache 2.0 with LLVM exceptions. But the two most-repeated selling points both need correcting: the "68,000x faster than Python" figure comes from a 2023 Mandelbrot blog series whose baseline is a single-threaded pure-CPython loop — Modular itself explained that 35,000x became 68,000x only because they switched to an 88-core machine — and the "superset of Python" positioning now reads, in the official roadmap, "may or may not... and it's okay if it doesn't." There's also something the announcement didn't headline: Qualcomm completed its acquisition of Modular on July 29. Here's the exact scope of the release, the conditions the benchmark holds under, the real cost of interop, and whether to pick it up now.