A simpler quantization mix trying to balance speed, size and performance on older hardware. Full Q8 n-gram pipeline.

Size
114,245 MiB ยท 5.42 bpw ยท 6 shards (core 60.9 GiB + 50.7 GiB table on disk).
Approx 65-70GiB total of RAM and/or VRAM needed for 131K context and Q8/F16 cache with n-gram offloading enabled.
MTP not included, use whichever standalone version fits best. Though currently --ngram-mod drafting and variants seems to work better in most cases.
Addendum: Added a standalone MTP GGUF in simple Q4_0 format. With F16 k/v cache it seems to give a noticeable, but not overwhelming, boost. However prompt processing takes a bit of a hit so depending if your weakest link is PP or TG it might be better to just stick to basic n-gram draft.

Recipe
(base Q8_0): signal path โ†’ Q8_0 ยท gate/up โ†’ Q3_K (edge blk 0โ€“3 / 40โ€“47 โ†’ IQ4_NL) ยท down โ†’ IQ4_NL ยท n-gram table โ†’ Q8_0.

PPL
4.6587 ยฑ 0.028 (WikiText-2, 512 ctx) = +1.49% vs the 4.5903 full BF16.

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GGUF
Model size
177B params
Architecture
qwen4exp
Hardware compatibility
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4-bit

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