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Step 3.5 Flash dramatically improves performance with 75% less memory overhead for large context windows in llama.cpp

r/LocalLLaMA · 2026年4月13日

Step 3.5 Flash dramatically improves performance with 75% less memory overhead for large context windows in llama.cpp

AI要約

  • Step 3.5 Flash now maintains only 2.5x performance slowdown at 170k context compared to previous 3x slowdown at 96k context
  • Context memory usage reduced by 75%, enabling users to run larger quantizations like Q4_K_L with up to 220k context window
  • Performance benchmarks on RTX 5090 + RTX PRO 6000 show sustained 75 tokens/sec at 170k context versus 45 tokens/sec previously
  • Improved model support makes Step 3.5 Flash significantly more practical for AI agents, Cline, and context-intensive orchestrators
  • Users can now choose between higher quality quantizations or parallel request processing while maintaining reasonable performance

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