llmfan46 · vision language

Qwen3.5-27B-uncensored-heretic-v2-Native-MTP-Preserved

llmfan46/Qwen3.5-27B-uncensored-heretic-v2-Native-MTP-Preserved

Qwen3.5-27B-uncensored-heretic-v2-Native-MTP-Preserved at Q4_K_M is exactly 17,211,793,632 bytes (16.03 GiB / 17.21 GB) — an effective 5.033 bits per weight, not the nominal 4. Its KV cache at 32K is 2.00 GiB.

From the file· summed from 1 file(s)From the file· KV per layer
Parameters
27.4B
Architecture
clip
64 layers
Context
262,144
native (config.json)
License
apache-2.0

Shipped quantizations

● exact bytes, summed from published files
QuantSize●Exact bytes●Effective bpw●Tensors●Publisher
Q3_K_M13.14 GiB14,105,489,6324.125—llmfan46
Q3_K_L14.12 GiB15,164,551,3924.435—llmfan46
Q4_K_S15.11 GiB16,226,377,9524.745—llmfan46
Q8_015.71 GiB16,871,847,7764.934—llmfan46
Q4_K_M16.03 GiB17,211,793,6325.033—llmfan46
Q5_K_S17.86 GiB19,181,068,5125.609—llmfan46
BF1618.30 GiB19,653,850,9765.747—llmfan46
Q5_K_M18.39 GiB19,745,087,7125.774—llmfan46
Q6_K21.24 GiB22,802,403,5526.668—llmfan46
Q8_027.05 GiB29,047,083,2328.494—llmfan46
BF1650.90 GiB54,657,732,83215.984—llmfan46

KV cache by context

computed per layer
ContextKV cache (f16)●Flat formulaOverstated byFull / windowed / recurrent
4,0960.25 GiB1.00 GiB4.00×16 / 0 / 48
8,1920.50 GiB2.00 GiB4.00×16 / 0 / 48
16,3841.00 GiB4.00 GiB4.00×16 / 0 / 48
32,7682.00 GiB8.00 GiB4.00×16 / 0 / 48
65,5364.00 GiB16.00 GiB4.00×16 / 0 / 48
131,0728.00 GiB32.00 GiB4.00×16 / 0 / 48

48 of 64 layers use linear attention, which keeps a fixed-size recurrent state instead of a per-token cache. Those layers do not grow with context at all — treating them as ordinary attention, as a flat formula does, overstates this model's cache by roughly 4.0× at long context.

Compare with

same modality, comparable size
vs Qwen3.6-35B-A3Bvs Qwen3.6-27B-Fable-Fusion-711-Uncensored-Heretic-NM-DAU-MTPvs Qwen3.5-9Bvs gemma-4-26B-A4B-itvs gemma-4-12B-itvs Qwen3.5-4BAll alternatives →Will it fit on my card? →

Will it run on your card?

full quant x context sweep
By VRAM:8GB12GB16GB24GB32GB48GB
Radeon RX 6500 XT 4GBGeForce RTX 3050 6GBGeForce RTX 5050 8GBGeForce RTX 3080 10GBGeForce RTX 2080 Ti 11GBGeForce RTX 5070 12GBGeForce RTX 5060 Ti 16GBApple M3 Pro 18GBGeForce RTX 3080 Ti 20GBGeForce RTX 5090 D V2 24GBGeForce RTX 5090 D 32GBApple M5 Max 36GBApple M5 Pro 48GBApple M5 Max 64GBApple M3 Ultra 96GBApple M5 Max 128GBApple M2 Ultra 192GBApple M3 Ultra 256GBApple M3 Ultra 512GB

Why other calculators give a different number

A parameters × bits ÷ 8 estimate puts Q4_K_M at roughly 14.33 GiB. The real file is 16.03 GiB, because a quantization is a mixture and some tensors are always kept at higher precision.

Architecture

from config.json
Layers
64
Attention heads
24
KV heads
4
Head dim
256
Hidden size
5120
Vocab
248,320
Sliding window
none
SWA period
—
MLA
no
Experts
—
Experts per token
—
use_sliding_window
—

Questions people ask

How much VRAM does Qwen3.5-27B-uncensored-heretic-v2-Native-MTP-Preserved need?
Q4_K_M is exactly 17,211,793,632 bytes (16.03 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
How large is Qwen3.5-27B-uncensored-heretic-v2-Native-MTP-Preserved's KV cache?
2.00 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.
Which quantization of Qwen3.5-27B-uncensored-heretic-v2-Native-MTP-Preserved 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.