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

MarkTechPost / 5/1/2026

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Key Points

  • Moonshot AI has open-sourced FlashKDA, a high-performance implementation of Kimi Delta Attention.
  • FlashKDA is designed to integrate directly with the flash-linear-attention ecosystem.
  • Benchmark results indicate FlashKDA is meaningfully faster than prior approaches.
  • The release emphasizes support for variable-length batching and includes H20 performance benchmarks.

Moonshot AI releases FlashKDA, a high-performance implementation of Kimi Delta Attention that plugs directly into the flash-linear-attention ecosystem — and benchmarks show it's meaningfully faster.

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