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functiongemma-270m-it

google/functiongemma-270m-it

functiongemma-270m-it at Q4_K_M is exactly 253,127,392 bytes (0.24 GiB / 0.25 GB) — an effective 7.553 bits per weight, not the nominal 4. Its KV cache at 32K is 0.11 GiB, not the 0.56 GiB a flat formula predicts.

From the file· summed from 1 file(s)From the file· KV from mirror (mirror:unsloth/functiongemma-270m-it)
Parameters
268M
Architecture
gemma3
18 layers
Context
32,768
native (config.json)
License
gemma

Shipped quantizations

exact bytes, summed from published files
QuantSizeExact bytesEffective bpwTensorsPublisher
UD-IQ2_XXS0.17 GiB179,748,0645.364unsloth
UD-IQ2_M0.17 GiB182,430,9445.444unsloth
UD-IQ3_XXS0.17 GiB184,161,5045.495unsloth
IQ2_M0.22 GiB234,797,7927.006bartowski
IQ3_XXS0.22 GiB235,985,6327.042bartowski
Q3_K_S0.22 GiB236,722,9127.064bartowski
Q3_K_S0.22 GiB236,723,4247.064unsloth
Q2_K0.22 GiB237,091,5527.075bartowski
Q2_K_L0.22 GiB237,091,5527.075bartowski
IQ3_XS0.22 GiB237,091,5527.075bartowski
Q2_K0.22 GiB237,092,0647.075unsloth
Q2_K_L0.22 GiB237,092,0647.075unsloth
IQ3_M0.22 GiB239,006,4327.132bartowski
IQ4_XS0.22 GiB240,870,1127.188bartowski
IQ4_XS0.22 GiB240,870,6247.188unsloth
Q4_00.22 GiB241,586,9127.209bartowski
Q4_00.22 GiB241,587,4247.209unsloth
IQ4_NL0.23 GiB241,976,0327.221bartowski
Q3_K_M0.23 GiB241,976,0327.221bartowski
Q3_K_M0.23 GiB241,976,5447.221unsloth
IQ4_NL0.23 GiB241,976,5447.221unsloth
Q3_K_L0.23 GiB246,399,7127.353bartowski
Q4_10.23 GiB247,689,9527.391bartowski
Q4_10.23 GiB247,690,4647.391unsloth
Q4_K_S0.23 GiB249,901,7927.457bartowski
Q4_K_S0.23 GiB249,902,3047.457unsloth
Q4_K_L0.24 GiB253,127,3927.553bartowski
Q4_K_M0.24 GiB253,127,3927.553bartowski
Q4_K_M0.24 GiB253,127,9047.553unsloth
Q5_K_S0.24 GiB258,011,8727.699bartowski
Q5_K_S0.24 GiB258,012,3847.699unsloth
Q5_K_M0.24 GiB260,039,3927.760bartowski
Q5_K_L0.24 GiB260,039,3927.760bartowski
Q5_K_M0.24 GiB260,039,9047.760unsloth
Q6_K0.26 GiB282,987,2328.444bartowski
Q6_K_L0.26 GiB282,987,2328.444bartowski
Q6_K0.26 GiB282,987,7448.444unsloth
Q8_00.27 GiB291,557,7928.700ggml-org
Q8_00.27 GiB291,558,1128.700bartowski
Q8_00.27 GiB291,558,6248.700unsloth

KV cache by context

computed per layer — this model uses sliding-window attention
ContextKV cache (f16)Flat formulaOverstated byFull / windowed / recurrent
4,0960.03 GiB0.07 GiB2.67×3 / 15 / 0
8,1920.04 GiB0.14 GiB3.69×3 / 15 / 0
16,3840.06 GiB0.28 GiB4.57×3 / 15 / 0
32,7680.11 GiB0.56 GiB5.19×3 / 15 / 0
65,5360.20 GiB1.13 GiB5.57×3 / 15 / 0
131,0720.39 GiB2.25 GiB5.77×3 / 15 / 0

15 of 18 layers cache only a 512-token window rather than the full context, on a period of 6. 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 0.14 GiB. The real file is 0.24 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 0.56 GiB at 32K context where the real figure is 0.11 GiB, because most of this model's layers cache a fixed window rather than the whole context.

Architecture

from mirror:unsloth/functiongemma-270m-it
Layers
18
Attention heads
4
KV heads
1
Head dim
256
Hidden size
640
Vocab
262,144
Sliding window
512
SWA period
6
MLA
no
Experts
Experts per token
use_sliding_window

Questions people ask

How much VRAM does functiongemma-270m-it need?
Q4_K_M is exactly 253,127,392 bytes (0.24 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
How large is functiongemma-270m-it's KV cache?
0.11 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 functiongemma-270m-it 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.