FLUX.2 Klein 4B VRAM Requirements
Developed by Black Forest Labs
Determine the local VRAM and system RAM requirements to run the FLUX.2 Klein 4B image generation model. Calculate components footprint, check VRAM margins, and optimize configurations for local generation speed.
Hardware Configuration
Adjust settings to check compatibility with your system in real time.
Available: 14.50 GB
Available: 29.00 GB
Some layers must be offloaded to system memory. The model will run, but expect significantly slower generation speeds.
Requires 21.75 GB total memory (weights: 15.79 GB, overhead: 5.96 GB).
FLUX.2 Klein 4B Component VRAM Breakdown
How to Setup and Run FLUX.2 Klein 4B Locally
Download Weights from Hugging Face
Open-source image model weights are hosted on Hugging Face. You will need to download the model files (safetensors or GGUF variants) and place them in your UI's model folder.
Setup inside ComfyUI or WebUI
Most image models require a generation framework:
- ComfyUI (Recommended): Put the UNet/Transformer weight files inside `ComfyUI/models/checkpoints/` or `ComfyUI/models/unet/` and the VAE inside `ComfyUI/models/vae/`.
- Stable Diffusion WebUI (Forge/re-forge): Put checkpoint files inside `webui/models/Stable-diffusion/`.
Model Specs
- DeveloperBlack Forest Labs
- AvailabilityLocal-Only
- Official SiteVisit site
Key Strengths
Commercial API Pricing
Commercial API costs $0.0140 per generated image.
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