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Run FLUX.2-klein-4B on Lium
Black Forest Labs · Image editing · 3.9B parameters · 16 GB BF16 weights · released 2026-01-14
It needs about 20 GB of VRAM. The cheapest setup that runs it is RTX A4500 (20 GB), from $0.16 per hour, billed per second.
Other GPUs that run it
How to run it
Rent the pod above, open a terminal over SSH or Jupyter and serve black-forest-labs/FLUX.2-klein-4B:
vllm serve black-forest-labs/FLUX.2-klein-4BClaude Code and Codex can do all of it through the Lium CLI.
Frequently asked questions
How much VRAM does FLUX.2-klein-4B need?
About 16 GB for the released BF16 weights, so plan on 20 GB with room for activations and KV cache at a short context. Longer contexts and bigger batches need more.
What GPU should I rent to run FLUX.2-klein-4B?
RTX A4500 (20 GB). On Lium that setup costs from $0.16 per hour, billed per second with no minimum.
For AI agents (CLI install, agent skill, headless signup): llms-full.txt