maharshi
@maharshii · May 28, 2026
they made an in-house AI training stack from scratch in C as a hobby project
Elon Musk@elonmusk· May 28, 2026SpaceX has almost finished writing V1.0 of an in-house AI training stack in C that exact-maps to 220k GB300s with 800G NICs, making heavy use of pipeline parallelism and getting as close to bare metal as possible.
The potential speed improvement vs JAX for large training runs is
Elon Musk
@elonmusk
It’s essential or we simply cannot be competitive
05:32 PM · May 28, 2026 · 150.7K views
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