Aug 13, 2026 · 10 min
OxiCUDA 0.5.5 Released — The Alt-Backend Audit Finds Metal's GPU Kernels Were Never Called
OxiCUDA 0.5.5 audits oxicuda-metal and oxicuda-webgpu on real Apple Silicon, fixing conv2d/attention/softmax false completions where finished MSL kernels sat unused behind CPU scalar loops. Separately, a downstream investigation wires up an unreachable split-K GEMM path, replaces a silent Winograd no-op with a real kernel, and fixes wrong Ampere GA10x hardware constants — measured on a real RTX A4000. 38,987 tests, ~1.31M SLoC, 74 crates.
releaseoxicudacuda