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Featured image for article: Multi-Query Attention and Grouped-Query Attention: Reducing KV Cache by 8× at the Architecture Level
Mar 31, 2026 MQA GQA multi-query attention grouped-query attention KV cache reduction Llama 3

Multi-Query Attention and Grouped-Query Attention: Reducing KV Cache by 8× at the Architecture Level

Standard multi-head attention uses separate K and V for each head. MQA and GQA share them — reducing KV cache dramatically with minimal quality loss.