Luminal – Open-source, search-based GPU compiler
Hi HN, I’m Joe. My friends Matthew, Jake and I are building Luminal (https://luminalai.com/), a GPU compiler for automatically generating fast GPU kernels for AI models. It uses search-based compilation to achieve high performance. We take high level model code, like you'd have in PyTorch, and generate very fast GPU code. We do that without using LLMs or AI - rather, we pose it as a search problem. Our compiler builds a search space, generates millions of possible kernels, and then searches through it to minimize runtime. You can try out a demo in `demos/matmul` on mac to…
Luminal – Open-source, search-based GPU compiler launched on August 20, 2025 with 153 votes, #219 of 8,530 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Luminal is an open-source GPU compiler that automatically generates optimized GPU kernels for AI models. It takes high-level model code written in frameworks like PyTorch and converts it to fast GPU code using search-based compilation. Rather than using AI or LLMs, the compiler creates a search space containing millions of possible kernels and identifies the fastest option by minimizing runtime. It is designed for developers building AI models who need efficient GPU code generation.
written from the facts on this page · September 2026
From the sources
Inference at the speed of light. Contribute to luminal-ai/luminal development by creating an account on GitHub.
In the maker’s words, at launch
Hi HN, I’m Joe. My friends Matthew, Jake and I are building Luminal (https://luminalai.com/), a GPU compiler for automatically generating fast GPU kernels for AI models. It uses search-based compilation to achieve high performance. We take high level model code, like you'd have in PyTorch, and generate…
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