Remark. Multi-head, grouped-query, and compressed-attention variants [ftip-000V]
Remark. Multi-head, grouped-query, and compressed-attention variants [ftip-000V]
The multi-head construction in Definition [ftip-000U] stores a key and value projection per query head. Grouped-query attention instead partitions query heads into groups that share key and value heads; see Ainslie et al., Section 2 [⧉]. This changes parameter and cache shapes while preserving the query-key-value semantics.
Multi-head latent attention first compresses key-value information through a lower-dimensional latent representation and reconstructs head-specific quantities; see DeepSeek-V2, Section 2.1 [⧉]. DeepSeek-V3, Section 2.1, records a later use of that architecture [⧉]. These architectural differences do not establish that their post-training effects equal those of ordinary multi-head attention.