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Huihui-gpt-oss-20b-BF16-abliterated

huihui-ai/Huihui-gpt-oss-20b-BF16-abliterated

Huihui-gpt-oss-20b-BF16-abliterated at Q4_K_M is exactly 11,673,418,400 bytes (10.87 GiB / 11.67 GB) — an effective 4.465 bits per weight, not the nominal 4. Its KV cache at 32K is 0.77 GiB, not the 1.50 GiB a flat formula predicts.

From the file· summed from 1 file(s)From the file· KV per layer
Parameters
20.9B
total, not active
Architecture
gpt-oss
24 layers
Context
131,072
native (config.json)
License
apache-2.0

Shipped quantizations

exact bytes, summed from published files
QuantSizeExact bytesEffective bpwTensorsPublisher
Q3_K_L10.70 GiB11,488,222,8804.394bartowski
IQ2_XS10.72 GiB11,510,341,2804.403bartowski
IQ2_XXS10.72 GiB11,510,341,2804.403bartowski
Q4_010.73 GiB11,519,188,6404.406bartowski
IQ2_S10.75 GiB11,545,730,7204.416bartowski
IQ2_M10.75 GiB11,545,730,7204.416bartowski
Q3_K_S10.76 GiB11,554,578,0804.420bartowski
IQ3_M10.77 GiB11,559,001,7604.421bartowski
IQ3_XS10.77 GiB11,559,001,7604.421bartowski
IQ3_XXS10.77 GiB11,559,001,7604.421bartowski
Q2_K10.77 GiB11,559,001,7604.421bartowski
Q3_K_M10.77 GiB11,559,186,0804.421bartowski
IQ4_NL10.77 GiB11,561,213,6004.422bartowski
IQ4_XS10.77 GiB11,561,213,6004.422bartowski
Q4_110.80 GiB11,592,985,7604.434bartowski
Q4_K_S10.87 GiB11,667,151,5204.463bartowski
Q4_K_M10.87 GiB11,673,418,4004.465bartowski
Q5_K_S10.92 GiB11,722,885,2804.484bartowski
Q5_K_M10.92 GiB11,728,414,8804.486bartowski
Q2_K_L11.03 GiB11,848,568,4804.532bartowski
Q4_K_L11.07 GiB11,890,593,4404.548bartowski
Q5_K_L11.09 GiB11,909,394,0804.555bartowski
Q6_K_L11.21 GiB12,040,998,5604.606bartowski
Q6_K11.21 GiB12,040,998,5604.606bartowski
Q3_K_M12.03 GiB12,916,149,7284.941huihui-ai
Q4_K_M14.72 GiB15,805,135,3286.045huihui-ai
Q8_020.73 GiB22,261,911,0088.515huihui-ai
Q8_020.73 GiB22,261,911,2008.515bartowski
BF1638.99 GiB41,860,886,88016.012bartowski
F1638.99 GiB41,860,887,00816.012huihui-ai
IQ4_NL7 shards78.58 GiB84,375,324,92832.274DavidAU
Q5_16 shards88.57 GiB95,097,431,712DavidAU
Q8_05 shards102.72 GiB110,296,072,288DavidAU

KV cache by context

computed per layer — this model uses sliding-window attention
ContextKV cache (f16)Flat formulaOverstated byFull / windowed / recurrent
4,0960.11 GiB0.19 GiB1.68×12 / 12 / 0
8,1920.21 GiB0.38 GiB1.83×12 / 12 / 0
16,3840.39 GiB0.75 GiB1.91×12 / 12 / 0
32,7680.77 GiB1.50 GiB1.95×12 / 12 / 0
65,5361.52 GiB3.00 GiB1.98×12 / 12 / 0
131,0723.02 GiB6.00 GiB1.99×12 / 12 / 0

12 of 24 layers cache only a 128-token window rather than the full context, on a period of . Figures assume the default configuration; --swa-full disables the saving entirely.

Compare with

same modality, comparable size

Will it run on your card?

full quant x context sweep

Why other calculators give a different number

A parameters × bits ÷ 8 estimate puts Q4_K_M at roughly 10.96 GiB. The real file is 10.87 GiB, because a quantization is a mixture and some tensors are always kept at higher precision. The larger discrepancy is the cache: a flat formula gives 1.50 GiB at 32K context where the real figure is 0.77 GiB, because most of this model's layers cache a fixed window rather than the whole context.

Architecture

from config.json
Layers
24
Attention heads
64
KV heads
8
Head dim
64
Hidden size
2880
Vocab
201,088
Sliding window
128
SWA period
MLA
no
Experts
32
Experts per token
4
use_sliding_window

Questions people ask

How much VRAM does Huihui-gpt-oss-20b-BF16-abliterated need?
Q4_K_M is exactly 11,673,418,400 bytes (10.87 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
How large is Huihui-gpt-oss-20b-BF16-abliterated's KV cache?
0.77 GiB at 32K context with an f16 cache, computed per layer. Quantizing the cache to q8_0 roughly halves it, which is often the difference between a context length fitting and not.
Is Huihui-gpt-oss-20b-BF16-abliterated a mixture-of-experts model?
Yes — 32 experts, 4 routed per token. Every expert must be resident, but only the routed ones are read per token, which is why its memory requirement and its speed behave very differently.
Which quantization of Huihui-gpt-oss-20b-BF16-abliterated should I use?
Q4_K_M is the usual default. Pick the largest quantization that fits your card at the context you actually need — the table above gives exact sizes for every one published.