black-forest-labs · image

FLUX.1-Krea-dev

black-forest-labs/FLUX.1-Krea-dev

FLUX.1-Krea-dev at Q4_K_M is exactly 6,931,817,760 bytes (6.46 GiB / 6.93 GB) — an effective 4.660 bits per weight, not the nominal 4.

From the file· summed from 1 file(s)
Parameters
11.9B
Architecture
flux
Context
native (config.json)
License
other

Shipped quantizations

exact bytes, summed from published files
QuantSizeExact bytesEffective bpwTensorsPublisher
IQ1_S3.66 GiB3,927,223,5842.640calcuis
IQ1_M3.68 GiB3,953,648,9282.658calcuis
IQ2_XXS3.73 GiB4,003,138,8482.691calcuis
IQ2_XS3.73 GiB4,003,507,4882.691calcuis
Q2_K3.75 GiB4,023,690,5282.705QuantStack
IQ2_S3.83 GiB4,108,471,5842.762calcuis
Q2_K_S3.83 GiB4,108,563,7442.762calcuis
IQ3_XXS4.85 GiB5,206,527,2643.500calcuis
Q3_K_S4.87 GiB5,225,604,3843.513QuantStack
IQ3_S4.95 GiB5,311,675,6803.571calcuis
Q3_K_S4.99 GiB5,353,792,8003.599calcuis
Q3_K_M5.00 GiB5,368,489,2483.609QuantStack
Q3_K_M5.00 GiB5,368,489,2483.609calcuis
Q3_K_L5.12 GiB5,496,677,6643.695calcuis
Q4_K_S6.33 GiB6,797,337,8884.569QuantStack
Q4_K_S6.33 GiB6,797,337,8884.569markury
Q4_06.33 GiB6,797,337,8884.569QuantStack
Q4_K_S6.45 GiB6,925,526,3044.655calcuis
Q4_K_M6.46 GiB6,931,817,7604.660QuantStack
Q4_K_M6.58 GiB7,060,006,1764.746calcuis
Q4_17.02 GiB7,536,977,1845.066QuantStack
Q4_17.14 GiB7,665,165,6005.152calcuis
Q5_07.71 GiB8,276,616,4805.564QuantStack
Q5_K_S7.71 GiB8,276,616,4805.564QuantStack
Q5_07.83 GiB8,404,804,8965.650calcuis
Q5_K_S7.83 GiB8,404,804,8965.650calcuis
Q5_K_M7.84 GiB8,419,501,3445.660QuantStack
Q5_K_M7.96 GiB8,547,689,7605.746calcuis
Q5_18.40 GiB9,016,255,7766.061QuantStack
Q5_18.52 GiB9,144,444,1926.147calcuis
Q6_K9.17 GiB9,848,349,9846.620QuantStack
Q6_K9.29 GiB9,976,538,4006.706calcuis
Q8_011.84 GiB12,714,452,2568.546QuantStack
Q8_011.84 GiB12,714,452,2568.546markury
IQ4_XS2 shards12.09 GiB12,983,261,1848.727calcuis
IQ4_NL2 shards12.78 GiB13,722,900,4809.224calcuis
Q2_K4 shards15.26 GiB16,386,956,73611.015calcuis
F1622.17 GiB23,802,870,94416.000calcuis
BF1622.17 GiB23,809,041,69616.004calcuis
Q4_04 shards25.57 GiB27,452,128,70418.453calcuis

Pipeline components

a diffusion model is a graph of parts, not one file
ComponentSizeShareCan live on the CPU?
text encoder 28.87 GiB28%yes — the usual first VRAM saving
text encoder0.23 GiB1%yes — the usual first VRAM saving
denoiser22.48 GiB71%no, must be resident
vae0.16 GiB0%no, must be resident
Full pipeline31.74 GiBresident if nothing is offloaded

The parameter count published for a diffusion model describes the denoiser alone. Running it also requires its text encoder and VAE, and the text encoder is often nearly as large as the denoiser — which is why offloading it is the standard first move when you run out of memory. This repository also ships a single-file copy of the denoiser at its root; we count it once, not twice.

We publish component sizes here, not throughput. Community-submitted image-generation rates do exist for many GPUs and we show them on the hardware pages, but they aggregate runs at different resolutions, step counts and settings, so they cannot be attributed to one model. Peak memory during sampling is unmeasured by any public source, and we do not estimate it.

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 6.23 GiB. The real file is 6.46 GiB, because a quantization is a mixture and some tensors are always kept at higher precision.

Architecture

Architecture unavailable — this repository is gated and no ungated mirror was found. Exact file sizes above are still authoritative; only the KV math needs the config.

Questions people ask

How much VRAM does FLUX.1-Krea-dev need?
Q4_K_M is exactly 6,931,817,760 bytes (6.46 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
Which quantization of FLUX.1-Krea-dev 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.