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lfm2.5-1.2b-noval-agentic

atenareply/lfm2.5-1.2b-noval-agentic

lfm2.5-1.2b-noval-agentic at Q4_K_M is exactly 730,896,224 bytes (0.68 GiB / 0.73 GB) — an effective 4.996 bits per weight, not the nominal 4. Its KV cache at 32K is 0.38 GiB.

From the file· summed from 1 file(s)From the file· KV per layer
Parameters
1.2B
Architecture
lfm2
16 layers
Context
128,000
native (config.json)
License
other

Shipped quantizations

exact bytes, summed from published files
QuantSizeExact bytesEffective bpwTensorsPublisher
I1-IQ1_S0.28 GiB304,388,2242.081mradermacher
I1-IQ1_M0.30 GiB327,145,6002.236mradermacher
I1-IQ2_XXS0.34 GiB365,074,5602.495mradermacher
I1-IQ2_XS0.37 GiB396,204,1602.708mradermacher
I1-IQ2_S0.38 GiB403,789,9522.760mradermacher
I1-IQ2_M0.40 GiB434,133,1202.968mradermacher
I1-Q2_K_S0.43 GiB460,806,2723.150mradermacher
Q2_K0.45 GiB483,399,5203.304mradermacher
I1-Q2_K0.45 GiB483,399,8083.304mradermacher
I1-IQ3_XXS0.46 GiB490,985,6003.356mradermacher
I1-IQ3_XS0.50 GiB537,811,0723.676mradermacher
Q3_K_S0.52 GiB558,159,7123.815mradermacher
I1-Q3_K_S0.52 GiB558,160,0003.815mradermacher
I1-IQ3_S0.52 GiB558,160,0003.815mradermacher
I1-IQ3_M0.53 GiB566,794,3683.874mradermacher
Q3_K_M0.56 GiB600,348,5124.104mradermacher
I1-Q3_K_M0.56 GiB600,348,8004.104mradermacher
Q3_K_L0.59 GiB635,475,8084.344mradermacher
I1-Q3_K_L0.59 GiB635,476,0964.344mradermacher
I1-IQ4_XS0.62 GiB663,378,0484.535mradermacher
IQ4_XS0.62 GiB668,620,6404.570mradermacher
I1-IQ4_NL0.65 GiB695,752,8324.756mradermacher
I1-Q4_00.65 GiB697,849,9844.770mradermacher
Q4_K_S0.65 GiB700,471,1364.788mradermacher
I1-Q4_K_S0.65 GiB700,471,4244.788mradermacher
Q4_K_M0.68 GiB730,896,2244.996mradermacher
I1-Q4_K_M0.68 GiB730,896,5124.996mradermacher
I1-Q4_10.71 GiB760,502,4005.199mradermacher
Q5_K_S0.77 GiB825,251,6805.641mradermacher
I1-Q5_K_S0.77 GiB825,251,9685.641mradermacher
Q5_K_M0.79 GiB843,356,0005.765mradermacher
I1-Q5_K_M0.79 GiB843,356,2885.765mradermacher
Q6_K0.90 GiB962,844,5126.582mradermacher
I1-Q6_K0.90 GiB962,844,8006.582mradermacher
Q8_01.16 GiB1,246,254,9448.519mradermacher
F162.18 GiB2,343,327,58416.018mradermacher

KV cache by context

computed per layer
ContextKV cache (f16)Flat formulaOverstated byFull / windowed / recurrent
4,0960.05 GiB0.13 GiB2.67×6 / 0 / 10
8,1920.09 GiB0.25 GiB2.67×6 / 0 / 10
16,3840.19 GiB0.50 GiB2.67×6 / 0 / 10
32,7680.38 GiB1.00 GiB2.67×6 / 0 / 10
65,5360.75 GiB2.00 GiB2.67×6 / 0 / 10
131,0721.50 GiB4.00 GiB2.67×6 / 0 / 10

10 of 16 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 2.7× at long context.

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 0.61 GiB. The real file is 0.68 GiB, because a quantization is a mixture and some tensors are always kept at higher precision.

Architecture

from config.json
Layers
16
Attention heads
32
KV heads
8
Head dim
64
Hidden size
2048
Vocab
65,536
Sliding window
none
SWA period
MLA
no
Experts
Experts per token
use_sliding_window

Questions people ask

How much VRAM does lfm2.5-1.2b-noval-agentic need?
Q4_K_M is exactly 730,896,224 bytes (0.68 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
How large is lfm2.5-1.2b-noval-agentic's KV cache?
0.38 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 lfm2.5-1.2b-noval-agentic 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.