Gemma 4 and Qwen 3.6 with q8_0 and q4_0 KV cache: KL divergence results

Reddit r/LocalLLaMA / 4/24/2026

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Key Points

  • The post discusses benchmarking KL divergence results for Gemma 4 and Qwen 3.6 when using different KV cache quantization settings (q8_0 vs q4_0).
  • It links to a LocalBench/Substack article that presumably details the methodology and observed differences in model behavior under KV-cache compression.
  • The focus is on how quantizing the KV cache impacts output distribution similarity, as measured by KL divergence, rather than on training changes.
  • The comparison targets practical local inference efficiency tradeoffs associated with KV cache bit-width reductions.