Import AI 464: Fable writes GPU kernels; AI automation; and analog computation
Import AI 464 reports Fable wrote what maintainers called the first genuine and fastest megakernel on KernelBench-Mega. CUDA on RTX PRO 6000 Blackwell achieved 18.71x acceleration, versus 14.4x for Claude Opus 4.8, 11.14x for GLM-5.2 and 4.34x for GPT 5.5.