Cheapest FLUX.2 [klein] 4B
Run Black Forest Labs's open-weights FLUX.2 [klein] 4B from $0.001/image — up to 93% below the official price, and below 4 popular platforms. Same price in the Studio and the API, no subscription needed, and failed generations are refunded.
- Cheapest image
- $0.001
- 1K
- Per image from
- $0.001
- 1K
- Below official
- up to 93%
- Subscription
- Optional
- pay per use
Try it
Try FLUX.2 [klein] 4B at its lowest price
Pre-set to the cheapest settings (1K). The price is on the button; failed runs are refunded.
Price comparison
Where FLUX.2 [klein] 4B costs less
Price per image here, at the official price and on popular platforms that charge more.
| Where | 1K | 2K |
|---|---|---|
CheaperGen live price | $0.001/image−93% | $0.0038/image−78% |
Black Forest Labs (official) official list price | $0.014/image | $0.0172/image |
fal | $0.005/image | $0.02/image |
Replicate | $0.001/image | $0.004/image |
WaveSpeed | $0.008/image | $0.008/image |
OpenRouter | $0.014/image | — |
Per image. Official price: BFL API list price for FLUX.2 [klein] 4B ($0.014 for the first output megapixel, $0.001 per additional MP; input images at $0.001 / MP), verified October 18, 2026. Other platforms: public list prices, checked October 21, 2026; not every platform is listed. Sources: fal (fal.ai/models/fal-ai/flux-2/klein/4b), Replicate (replicate.com/black-forest-labs/flux-2-klein-4b), WaveSpeed (wavespeed.ai/models/wavespeed-ai/flux-2-klein-4b/text-to-image), OpenRouter (openrouter.ai/models). Ours are live.
Cheapest settings
The least you can pay for a FLUX.2 [klein] 4B image
One image at each size, at its lowest price.
| Size | Official | CheaperGen |
|---|---|---|
| 1K | $0.001 | |
| 2K | $0.004 |
Try it in the Studio — the price is on the Generate button before you run. Totals for real projects: FLUX.2 [klein] 4B API Cost.
Why it costs less
FLUX.2 [klein] 4B: open weights, for less
An open-weights model has no lab API price in between: what you pay follows what serving it costs.
Open weights
FLUX.2 [klein] 4B is Black Forest Labs's open-weights model: no lab API price sits in between, so what you pay follows what serving it costs.
Our own GPU inference
For open-source models, our own GPU inference — optimized kernels, warm pools and per-model tuning — makes generation several times faster and lowers the cost further.
Automatic routing
Every FLUX.2 [klein] 4B request is routed to the most cost-effective healthy route, with live health checks and failover.
FAQ
Cheapest FLUX.2 [klein] 4B: questions
FLUX.2 [klein] 4B is Black Forest Labs' open-weights model. CheaperGen provides API access to the open weights, run on GPU inference for open-source models, and does not own the model. Trademarks belong to their respective owners.