Moonshot AI Open-Sources FlashKDA: CUTLASS Kernels for Kimi Delta Attention with Variable-Length Batching and H20 Benchmarks

Moonshot AI has open-sourced FlashKDA, a high-performance CUDA kernel based on CUTLASS for Kimi Delta Attention (KDA), delivering up to 2.22× speedup over existing implementations on NVIDIA H20 GPUs. This development is crucial for developers and tech professionals working with large language models as it significantly improves the efficiency of linear attention mechanisms, enabling faster prefill operations and variable-length batching support.

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