FLUX 3 Image Klein / Guide · Updated 2026-10-16

FLUX 3 Image Klein API pricing

Through the Black Forest Labs API, FLUX 3 Image Klein (model id flux-3-image-klein) costs $0.009 per 1K image — $0.008 at 768×768 and $0.036 at 4K — the same price for generating and editing. Median latency at 1 megapixel is 4.54 s for text-to-image and 7.18 s for edits.

Price per image

Resolution	Generate or edit	Images per $10
768 × 768	$0.008	1,250
1K	$0.009	≈1,111
1.5K	$0.011	≈909
2K	$0.014	≈714
4K	$0.036	≈277

The API serves the step-distilled checkpoint and adds prompt upsampling and pixel restoration (unedited pixels stay exactly the same). It's also in the BFL Playground.

Compared with other image models

Model	1K	2K	4K
FLUX 3 Image Klein	$0.009	$0.014	$0.036
FLUX 3 Image	$0.048	$0.100	$0.607
FLUX.2 [klein] 4B / 9B	$0.014 / $0.015 per image
Google Nano Banana 2.1 (image output)	$0.0336	$0.0504	$0.113
Krea 3	$0.03	$0.06	—

Competitor prices as listed by BFL's release notes and by VentureBeat on October 15, 2026; providers change prices, so check before you budget.

API or self-hosting?

API: no GPU, pay per image, includes prompt upsampling and pixel restoration; allowed for companies of any size.
Self-hosting: free weights, but you pay for GPUs, storage and upkeep — and companies with $5M+ revenue need a commercial license from BFL (license guide).

FAQ

Questions about FLUX 3 Image Klein

How much does FLUX 3 Image Klein cost per image?

$0.008 at 768×768, $0.009 at 1K, $0.011 at 1.5K, $0.014 at 2K and $0.036 at 4K through the BFL API. Editing costs the same as generating.

What is the FLUX 3 Image Klein API model id?

flux-3-image-klein (the step-distilled checkpoint).

Is FLUX 3 Image Klein cheaper than FLUX 3 Image?

Yes, about five times cheaper at 1K ($0.009 vs $0.048) and about seventeen times cheaper at 4K ($0.036 vs $0.607).

Make images with FLUX 3 Image Klein — no setup

ImageKlein puts the model in your browser: text-to-image, edits and up to 10 references at up to 4K.

Start generating

Sources