FLUX.2 Klein 9B FP8 (Recommended) vs FLUX.2 Klein 4B (Apache 2.0)

Last data update: 2026-06-11T22:17:24.345Z

Intent: image-same-family-cost-and-size-comparison

Quality gate

Eligible for indexable canary
yes
Evidence score
7
CheckPassEvidence
same-type intent yes image vs image
distinct models yes flux2-klein-9b-fp8 vs flux2-klein-4b
pricing present yes $0.39/hr and $0.39/hr
deployment target present yes gpu-l4 and gpu-l4
source config facts present yes 39 facts and 39 facts
same-type catalog context present yes 27 image catalog rows
asset evidence when workflow model yes 64 matched asset rows

Evidence summary

FLUX.2 Klein 9B FP8 (Recommended)FLUX.2 Klein 4B (Apache 2.0)
Model groupflux2-kleinflux2-klein
Typeimageimage
Source idflux2-klein-9b-fp8flux2-klein-4b
Model size tiermediumsmall
Deployment templatecomfyui-flux2comfyui-flux2
Docker image basecomfyuicomfyui
Container port81888188
Web UI portn/an/a
Volume mount path/data/data
Parameters9B4B
Context windown/an/a
VRAM (GB)2424
Recommended GPUgpu-l4gpu-l4
GPU typeNVIDIA L4NVIDIA L4
GPU count11
vCPU1212
RAM (GB)5050
Disk (GB)200200
Instance typegpu-efficientgpu-efficient
RunPod idn/an/a
$/hr$0.39$0.39
$/month (24/7)$280.8$280.8
Popularity (1-10)1110
Deploy time (min)1818
Cost delta /hr
$0
VRAM delta GB
0
Best GPU tier to fit both
gpu-l4

Cost scenarios

Usage levelHours / monthflux2-klein-9b-fp8flux2-klein-4bDelta
Prototype, 40 hr/mo 40 $15.6 $15.6 $0
Part-time app, 160 hr/mo 160 $62.4 $62.4 $0
Always-on, 720 hr/mo 720 $280.8 $280.8 $0

Decision matrix

Factorflux2-klein-9b-fp8flux2-klein-4bWinner
Lower hourly cost $0.39/hr $0.39/hr flux2-klein-9b-fp8
Lower 24/7 monthly cost $280.8/mo $280.8/mo flux2-klein-9b-fp8
Lower VRAM tier 24GB 24GB flux2-klein-9b-fp8
Higher popularity score 11/10 10/10 flux2-klein-9b-fp8
Faster deployment estimate 18 min 18 min flux2-klein-9b-fp8
Template specificity comfyui-flux2 comfyui-flux2 flux2-klein-9b-fp8

Pair config delta

Description comparison

Fieldflux2-klein-9b-fp8flux2-klein-4b
DescriptionFastest Flux model; Sub-second generation, 4-step distilled; Runs on RTX 4090;Fully open source (Apache 2.0); Fast generation on RTX 3090/4070; ~13GB VRAM;
Use casesSub-second image generation; Real-time AI applications; Consumer GPU deployment; Open-source commercial use (Apache 2.0)Sub-second image generation; Real-time AI applications; Consumer GPU deployment; Open-source commercial use (Apache 2.0)
Related groupsflux-2; z-image-turbo; fluxflux-2; z-image-turbo; flux

Deployment facts

Deployment payload fields

flux2-klein-9b-fp8__flux2-klein-4b.candidate_a.modelType=image
flux2-klein-9b-fp8__flux2-klein-4b.candidate_a.modelName=flux2-klein-9b-fp8
flux2-klein-9b-fp8__flux2-klein-4b.candidate_a.instanceId=gpu-l4
flux2-klein-9b-fp8__flux2-klein-4b.candidate_a.templateName=comfyui-flux2
flux2-klein-9b-fp8__flux2-klein-4b.candidate_a.containerPort=default
flux2-klein-9b-fp8__flux2-klein-4b.candidate_a.dockerImageBaseName=comfyui
flux2-klein-9b-fp8__flux2-klein-4b.candidate_b.modelType=image
flux2-klein-9b-fp8__flux2-klein-4b.candidate_b.modelName=flux2-klein-4b
flux2-klein-9b-fp8__flux2-klein-4b.candidate_b.instanceId=gpu-l4
flux2-klein-9b-fp8__flux2-klein-4b.candidate_b.templateName=comfyui-flux2
flux2-klein-9b-fp8__flux2-klein-4b.candidate_b.containerPort=default
flux2-klein-9b-fp8__flux2-klein-4b.candidate_b.dockerImageBaseName=comfyui

Matched model assets

Paired source evidence

Pair-scoped catalog context

FAQ

What GPU runs flux2-klein-9b-fp8 in the flux2-klein-9b-fp8 vs flux2-klein-4b comparison?

For flux2-klein-9b-fp8 vs flux2-klein-4b, flux2-klein-9b-fp8 uses GPU Efficient (L4) with 24GB VRAM at $0.39/hr.

What GPU runs flux2-klein-4b in the flux2-klein-9b-fp8 vs flux2-klein-4b comparison?

For flux2-klein-9b-fp8 vs flux2-klein-4b, flux2-klein-4b uses GPU Efficient (L4) with 24GB VRAM at $0.39/hr.

Which is cheaper to run 24/7 for flux2-klein-9b-fp8 vs flux2-klein-4b?

For flux2-klein-9b-fp8 vs flux2-klein-4b, flux2-klein-9b-fp8 is cheaper at $280.80/month vs $280.80/month.