ggml-common.h (block struct definitions for every GGUF quant type)

Fields

id

sources/qlab2-ggml-common-header

URL

https://github.com/ggml-org/llama.cpp/blob/master/ggml/src/ggml-common.h

Publisher

ggml-org

Kind

repo

Accessed

2026-10-03

notes

AUTHORITATIVE source for GGUF/GGML block layouts. Defines QK_K=256 super-block, K_SCALE_SIZE=12, block_q2_K..block_q6_K, block_q8_K, block_iq1_s..block_iq4_xs, block_tq1_0/tq2_0, QK_NL=32 for iq4_nl, QK_NVFP4=64 with QK_NVFP4_SUB=16. Every comment on effective bpw is in this file. Accessed 2026-10-03. | SOURCE AUDIT 2026-10-03: the 'published' field held a verbatim copy of this notes paragraph instead of a date (field corruption across the qlab2-* batch); published set to null because a GitHub README, doc page or source header has no reliable publication date of its own. Content of the document itself was re-verified live 2026-10-03 and the notes are correct.

Notes

AUTHORITATIVE source for GGUF/GGML block layouts. Defines QK_K=256 super-block, K_SCALE_SIZE=12, block_q2_K..block_q6_K, block_q8_K, block_iq1_s..block_iq4_xs, block_tq1_0/tq2_0, QK_NL=32 for iq4_nl, QK_NVFP4=64 with QK_NVFP4_SUB=16. Every comment on effective bpw is in this file. Accessed 2026-10-03. | SOURCE AUDIT 2026-10-03: the 'published' field held a verbatim copy of this notes paragraph instead of a date (field corruption across the qlab2-* batch); published set to null because a GitHub README, doc page or source header has no reliable publication date of its own. Content of the document itself was re-verified live 2026-10-03 and the notes are correct.

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