flux-2-klein-4b

Black Forest Labs • flux-2-klein-4b

Model Information

Slug	flux-2-klein-4b
LLM.txt	View
Release Date	January 14, 2026

Organization

Name	Black Forest Labs
Website	https://blackforestlabs.ai

Model Description

FLUX.2 [klein] 4B is the fastest and most cost-effective model in the FLUX.2 family, optimized for high-throughput use cases while maintaining excellent image quality.

Pricing is based on the output image. The first generated megapixel is charged $0.014. Each subsequent megapixel is charged $0.001.

Available at 16 Providers

Provider	Type	Model Name	Original Model	Input ($/1M)	Output ($/1M)	Actions
OpenRouter	Chat Code	FLUX.2 Klein 4B	`black-forest-labs/flux.2-klein-4b`	$0.00	$0.00	Model
Nous Research		Black Forest Labs: FLUX.2 Klein 4B	`black-forest-labs/flux.2-klein-4b`	$0.00	$0.00	Visit
WaveSpeed AI	Chat Code	flux-2-klein-4b	`wavespeed-ai/flux-2-klein-4b/text-to-image`	$0.80	-	Visit
Near AI			`black-forest-labs/FLUX.2-klein-4B`	$1.00	$1.00	Visit
Replicate		flux-2-klein-4b	`black-forest-labs/flux-2-klein-4b`	-	-	Visit
Vercel AI Gateway		FLUX.2 [klein] 4B	`flux-2-klein-4b`	-	-	Visit
DeepInfra		FLUX-2-klein-4b	`black-forest-labs/FLUX-2-klein-4b`	-	-	Visit
Poe		Flux-2-Klein-4B	`flux-2-klein-4b`	-	-	Model
Airforce API		flux-2-klein-4b	`flux-2-klein-4b`	-	-	Visit
Arena AI	Chat		`flux-2-klein-4b`	-	-	Visit
Writingmate	Chat Code	Black Forest Labs: FLUX.2 Klein 4B	`black-forest-labs/flux.2-klein-4b`	-	-	Model
Nvidia		flux.2-klein-4b	`black-forest-labs/flux.2-klein-4b`	-	-	Model
ApiYI	Chat Code	flux-2-klein-4b	`flux-2-klein-4b`	-	-	Visit
Routeway		Black Forest Labs: FLUX.2 [klein] 4B	`flux-2-klein-4b`	-	-	Model
Naga		Flux 2 Klein 4B	`flux-2-klein-4b`	-	-	Visit
Runware		FLUX.2 [klein] 4B	`bfl-flux-2-klein-4b`	-	-	Visit

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