Black Forest Labs

FLUX.2-klein-4B

SIZE3.9B

15Quality

Image generation

Downloads440K/mo

Likes1K

Image editing model from Black Forest Labs, 3.9B parameters.

Open weightsApache 2.0745/1040

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Black Forest LabsImagePromo

FLUX.2-klein-4B

Image editing model from Black Forest Labs, 3.9B parameters.

black-forest-labs/FLUX.2-klein-4B

Type: Image
Quality: 15 · Top 85% on the LMArena Text to Image
Parameters: 3.9B (3,875,544,576)
Downloads: 440K in the last 30 days
Likes: 1K
Access to weights: Open download
On Hugging Face since: Jan 14, 2026
Takes in: Text, Image
Puts out: Image
Access: Open weights
License: Apache 2.0
Rarity: Promo
Set number: 745/1040

Open on Hugging Face Quality 15 Where to run it 3 Meet its creature Battle Qwen-Image-Edit-2509

License read from the model’s Hugging Face card. Stats from Black Forest Labs’s official Hugging Face account, refreshed daily.

How good is it?

Public leaderboard scores for FLUX.2-klein-4B, refreshed daily from Epoch AI and LMArena.

Top 85% of the 82 models on the LMArena Text to Image: #70.

Quality is the share of a leaderboard’s models this one beats, from 0 to 100. Chat models are rated on Epoch AI’s Capabilities Index when it lists them, otherwise on LMArena; image and video models on LMArena’s image and video arenas.

Leaderboards

LMArena Text to Image#70 of 82
Two images from the same prompt; people pick the better one.1,030 rating
LMArena Image Edit#49 of 59
Two edits of the same image; people pick the better one.1,187 rating

Scores from LMArena, licensed CC BY 4.0. Boards list models under their own names, so a close match is shown with the name it was scored under. Credits

Where to run it

3 providers sell FLUX.2-klein-4B through an API. Prices are per million tokens, cheapest first.

CheapestNEAR AI Cloud$1.00 in · $1.00 out
Free to try1 providerNvidia

API providers

Provider	Input	Output	Context
NvidiaFree`black-forest-labs/flux_2-klein-4b`	Free	Free	41K
NEAR AI Cloud`black-forest-labs/FLUX.2-klein-4B`	$1.00	$1.00	128K
Vercel AI Gateway`bfl/flux-2-klein-4b`	—	—	—

From models.dev and Hugging Face, checked daily. Resellers’ listings can lag behind their price pages, so confirm with the provider before you commit.

FLUX.2-klein-4B

FLUX.2-klein-4B

How good is it?

Leaderboards

Where to run it

API providers

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