PyTorch extends FlashAttention-4 with MXFP8 for Blackwell
PyTorch detailed an extension of FlashAttention-4 adding MXFP8 forward and backward passes for Blackwell GPUs. The block-scaled attention implementation reaches 2.85 PF/s forward and 2 PF/s backward on LLM shapes, and 2.54 PF/s on internal shapes, according to the PyTorch blog post.
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