PyPTX Surpasses FA4 on B300
A_K_Nain · x · 2026-07-16
PyPTX Flash Attention is compared to FlashAttention 4 on B300, and the cited post claims it's faster on all metrics: BF16 up to 7.1%, FP8 up to 6.9%, using strict paired timing.
It also claims PyPTX has better numerical precision than FA4. The poster says "it's ramping up," hinting at further optimization potential.
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