> No cuBLAS means they wrote their own GEMM kernels, which is a massive undertaking

Not to diminish the impressiveness of this overall project, but it says right up front that these were vibe coded and the Opus 4.6 co-author lines are right in the commit messages. Those pieces were adapted from existing work via LLM, which is exactly the right use in a proof of concept project like this.

Please don't use LLMs to post on HN...