Unverified60% confidenceFactExact time
Reducing the KV cache from FP16 to INT8 saves 50% of VRAM, and reducing it to INT4 saves 75%.
2
Sources
60%
Confidence
Long-term
Relevance
7/16/2026
First Seen
Sources
Related Claims
UnverifiedChoosing Q4_0 for KV cache quantization can compress the cache size to approximately one-quarter of FP16, with far less impact on output quality than model weight quantization.79% similarUnverifiedFP8 KV cache halves both the memory footprint of concurrent sequences and the number of bytes moved over the network.78% similarUnverifiedThe quantized MLX KV cache reduces prompt memory usage by up to 74% compared to before.75% similarUnverifiedEnabling Flash Attention and setting the cache type to Q8 can reduce KV Cache VRAM usage by about half, with very little quality loss.73% similarUnverifiedIn KV caching, cache writes are usually about 25% more expensive than ordinary input tokens, but cache reads are about 90% cheaper.72% similar
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