IQuestLab · text

IQuest-Coder-V1-40B-Instruct

IQuestLab/IQuest-Coder-V1-40B-Instruct

IQuest-Coder-V1-40B-Instruct at I1-IQ1_S is exactly 8,496,100,544 bytes (7.91 GiB / 8.50 GB) — an effective 1.708 bits per weight, not the nominal 1. Its KV cache at 32K is 10.00 GiB.

From the file· summed from 1 file(s)From the file· KV per layer
Parameters
39.8B
Architecture
llama
80 layers
Context
131,072
native (config.json)
License
other

Shipped quantizations

● exact bytes, summed from published files
QuantSize●Exact bytes●Effective bpw●Tensors●Publisher
I1-IQ1_S7.91 GiB8,496,100,5441.708—mradermacher
I1-IQ1_M8.68 GiB9,318,167,7441.873—mradermacher
I1-IQ2_XXS9.95 GiB10,688,279,7442.149—mradermacher
I1-IQ2_XS11.04 GiB11,849,905,3442.382—mradermacher
I1-IQ2_S11.48 GiB12,328,522,9442.478—mradermacher
I1-IQ2_M12.50 GiB13,424,612,5442.699—mradermacher
I1-Q2_K_S12.79 GiB13,738,366,1442.762—mradermacher
I1-Q2_K13.76 GiB14,769,738,9442.969—mradermacher
I1-IQ3_XXS14.38 GiB15,445,578,9443.105—mradermacher
I1-IQ3_XS15.32 GiB16,451,351,7443.307—mradermacher
I1-IQ3_S16.17 GiB17,365,578,9443.491—mradermacher
I1-Q3_K_S16.17 GiB17,365,578,9443.491—mradermacher
I1-IQ3_M16.61 GiB17,832,113,3443.585—mradermacher
I1-Q3_K_M17.92 GiB19,236,631,7443.867—mradermacher
I1-Q3_K_L19.40 GiB20,825,879,7444.187—mradermacher
I1-IQ4_XS19.86 GiB21,324,567,7444.287—mradermacher
I1-Q4_021.03 GiB22,578,762,9444.539—mradermacher
I1-Q4_K_S21.16 GiB22,719,665,3444.567—mradermacher
I1-Q4_K_M22.38 GiB24,030,385,3444.831—mradermacher
I1-Q4_123.24 GiB24,952,804,5445.016—mradermacher
I1-Q5_K_S25.53 GiB27,415,319,7445.511—mradermacher
I1-Q5_K_M26.26 GiB28,195,198,1445.668—mradermacher
I1-Q6_K30.41 GiB32,648,164,5446.563—mradermacher

KV cache by context

computed per layer
ContextKV cache (f16)●Flat formulaOverstated byFull / windowed / recurrent
4,0961.25 GiB1.25 GiB—80 / 0 / 0
8,1922.50 GiB2.50 GiB—80 / 0 / 0
16,3845.00 GiB5.00 GiB—80 / 0 / 0
32,76810.00 GiB10.00 GiB—80 / 0 / 0
65,53620.00 GiB20.00 GiB—80 / 0 / 0
131,07240.00 GiB40.00 GiB—80 / 0 / 0

Compare with

same modality, comparable size
vs Qwen3-Coder-30B-A3B-Instructvs Qwen3.6-27Bvs Qwen3.8-27Bvs gemma-4-12B-it-qat-q4_0-unquantizedvs gemma-4-E4B-itvs Qwen3-30B-A3B-Thinking-2507All 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 I1-IQ1_S at roughly 20.85 GiB. The real file is 7.91 GiB, because a quantization is a mixture and some tensors are always kept at higher precision.

Architecture

from config.json
Layers
80
Attention heads
40
KV heads
8
Head dim
128
Hidden size
5120
Vocab
76,800
Sliding window
none
SWA period
—
MLA
no
Experts
—
Experts per token
—
use_sliding_window
false

Questions people ask

How much VRAM does IQuest-Coder-V1-40B-Instruct need?
I1-IQ1_S is exactly 8,496,100,544 bytes (7.91 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
How large is IQuest-Coder-V1-40B-Instruct's KV cache?
10.00 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 IQuest-Coder-V1-40B-Instruct 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.