Tralalabs · text

CHEETAH-350M-Merged-FP16

Tralalabs/CHEETAH-350M-Merged-FP16

CHEETAH-350M-Merged-FP16 at Q4_K_M is exactly 231,031,616 bytes (0.22 GiB / 0.23 GB) — an effective 5.214 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
354M
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_S0.10 GiB106,964,2242.414mradermacher
I1-IQ1_M0.11 GiB113,255,6802.556mradermacher
I1-IQ2_XXS0.12 GiB123,741,4402.793mradermacher
I1-IQ2_XS0.12 GiB132,326,6562.986mradermacher
I1-IQ2_S0.13 GiB134,489,3443.035mradermacher
I1-IQ2_M0.13 GiB142,877,9523.224mradermacher
IQ2_M0.14 GiB149,488,4483.374bartowski
I1-Q2_K_S0.14 GiB154,182,9123.480mradermacher
I1-IQ3_XXS0.15 GiB158,475,5203.576mradermacher
IQ3_XXS0.15 GiB159,982,4003.611bartowski
I1-Q2_K0.15 GiB160,597,2483.624mradermacher
Q2_K0.15 GiB161,628,9923.648bartowski
I1-IQ3_XS0.16 GiB175,400,1923.958mradermacher
IQ3_XS0.16 GiB176,661,3123.987bartowski
Q2_K_L0.17 GiB177,881,9204.014bartowski
I1-IQ3_S0.17 GiB181,150,9764.088mradermacher
I1-Q3_K_S0.17 GiB181,150,9764.088mradermacher
Q3_K_S0.17 GiB181,969,7284.107bartowski
I1-IQ3_M0.17 GiB183,657,7284.145mradermacher
IQ3_M0.17 GiB184,869,6964.172bartowski
I1-Q3_K_M0.18 GiB193,152,2564.359mradermacher
Q3_K_M0.18 GiB193,971,0084.378bartowski
I1-Q3_K_L0.19 GiB203,048,1924.582mradermacher
Q3_K_L0.19 GiB203,080,5124.583bartowski
I1-IQ4_XS0.20 GiB210,330,8804.747mradermacher
IQ4_XS0.20 GiB210,936,6404.760bartowski
I1-IQ4_NL0.20 GiB219,309,3124.949mradermacher
IQ4_NL0.20 GiB219,849,5364.962bartowski
I1-Q4_00.20 GiB219,899,1364.963mradermacher
Q4_00.21 GiB220,439,3604.975bartowski
I1-Q4_K_S0.21 GiB220,751,1044.982mradermacher
Q4_K_S0.21 GiB221,160,2564.991bartowski
I1-Q4_K_M0.21 GiB229,311,7445.175mradermacher
Q4_K_M0.22 GiB231,031,6165.214bartowski
I1-Q4_10.22 GiB237,266,1765.355mradermacher
Q4_10.22 GiB237,675,3285.364bartowski
Q4_K_L0.23 GiB247,284,5445.581bartowski
I1-Q5_K_S0.24 GiB255,223,0405.760mradermacher
Q5_K_S0.24 GiB255,501,1205.766bartowski
I1-Q5_K_M0.24 GiB260,375,8085.876mradermacher

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 0.19 GiB. The real file is 0.22 GiB, because a quantization is a mixture and some tensors are always kept at higher precision.

Architecture

from config.json
Layers
16
Attention heads
16
KV heads
8
Head dim
64
Hidden size
1024
Vocab
65,536
Sliding window
none
SWA period
MLA
no
Experts
Experts per token
use_sliding_window

Questions people ask

How much VRAM does CHEETAH-350M-Merged-FP16 need?
Q4_K_M is exactly 231,031,616 bytes (0.22 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
How large is CHEETAH-350M-Merged-FP16'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 CHEETAH-350M-Merged-FP16 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.