Black Forest Labs · 9 models
FLUX API
Black Forest Labs' FLUX video and image models through one API: FLUX 3 Image Klein, FLUX 3, FLUX 3 Video, FLUX.2 [klein] 4B, FLUX.2 [max] and 4 more. Video from $0.1564/s, image from $0.001/image, up to 93% below official. Text and image to video, up to 720p, clips up to 20 s, with audio; Text-to-image and editing, up to 4K.
- Models
- 9
- video · image
- video from
- $0.1564/s
- FLUX 3 Video
- image from
- $0.001/image
- FLUX.2 [klein] 4B
- Below official
- up to 93%
- FLUX.2 [klein] 4B
video models
FLUX video model on CheaperGen
Starting price per second at each model's lowest tier, next to the fal API price.
T2V · I2V | 720p | 5–20 s | Included | $0.1564/s 720p | $0.17/s vs. fal API | up to 8% |
image models
FLUX image models on CheaperGen
Starting price per image at each model's lowest tier, next to Black Forest Labs' official price. Select a column to sort.
T2I · Edit | 4K | Up to 10 | $0.0317/image 1K | $0.048/image | up to 34% | |
T2I · Edit | 4K | Up to 10 | $0.0011/image 768 | $0.008/image | up to 87% | |
T2I · Edit | 2K | Up to 4 | $0.001/image 1K | $0.014/image | up to 93% | |
T2I · Edit | 4 MP | Up to 8 | $0.0276/image 1 MP | $0.03/image | up to 38% | |
T2I | 4 MP | — | $0.0644/image 1 MP | $0.07/image | up to 21% | |
T2I | 4 MP | — | $0.046/image 1 MP | $0.05/image | up to 32% | |
T2I · Edit | 1K | Up to 4 | $0.0348/image Image | $0.04/image | up to 13% | |
T2I · Edit | 1K | Up to 4 | $0.0695/image Image | $0.08/image | up to 13% |
Model picker
Which FLUX model is right for you?
Pick what you need and what matters most; we'll suggest a model and load it in the playground below.
Your FLUX pick
FLUX.2 [klein] 4B
From $0.001/image
- The lowest starting price: $0.001/image
Then: FLUX 3 Image Klein, FLUX.2 [pro]
How to choose
Which FLUX model should you use?
- Newest
- FLUX 3 Image Klein, released October 2026.
- Lowest price · image
- FLUX.2 [klein] 4B from $0.001/image (1K).
- Highest resolution
- FLUX 3 Image Klein and FLUX 3 — up to 4K.
- Longest clips
- FLUX 3 Video — up to 20 s per generation.
- Audio included
- FLUX 3 Video generates synchronized sound at no extra cost.
- Most edit inputs
- FLUX 3 Image Klein and FLUX 3 — up to 10 input images per edit.
- Built for volume
- FLUX 3 Image Klein and FLUX.2 [klein] 4B: faster, lower-cost versions for drafts and high volume.
Prices side by side
FLUX API pricing per image
Each FLUX image model at every size it offers — the lowest price per image, with Black Forest Labs' official price struck through. Lowest per row in orange.
| Size | FLUX 3 Image Klein | FLUX 3 | FLUX.2 [klein] 4B | FLUX.2 [max] | FLUX.2 [pro] | FLUX.2 [flex] | FLUX.1 Kontext [pro] | FLUX.1 Kontext [max] |
|---|---|---|---|---|---|---|---|---|
| 768 | $0.0011/image With a monthly plan: Max $0.001 | — | — | — | — | — | — | — |
| 1K | $0.0019/image With a monthly plan: Pro $0.0018Max $0.0017 | $0.0317/image | $0.001/image With a monthly plan: Max $0.0009 | $0.0644/image | $0.0276/image | $0.046/image | $0.0348/image With a monthly plan: Pro $0.0341Max $0.0333 | $0.0695/image With a monthly plan: Pro $0.0681Max $0.0666 |
| 2 MP | — | — | — | $0.0889/image With a monthly plan: Pro $0.0877Max $0.0865 | $0.0396/image With a monthly plan: Pro $0.039Max $0.0383 | $0.0861/image With a monthly plan: Pro $0.0841Max $0.0821 | — | — |
| 1.5K | $0.0043/image With a monthly plan: Pro $0.004Max $0.0038 | $0.0644/image | — | — | — | — | — | — |
| 3 MP | — | — | — | $0.1091/image With a monthly plan: Pro $0.1059Max $0.1027 | $0.0493/image With a monthly plan: Pro $0.0477Max $0.0461 | $0.115/image With a monthly plan: Pro $0.1101Max $0.1052 | — | — |
| 2K | $0.0074/image With a monthly plan: Pro $0.0069Max $0.0065 | $0.092/image | $0.0038/image With a monthly plan: Pro $0.0037Max $0.0036 | $0.1263/image With a monthly plan: Pro $0.1214Max $0.1165 | $0.0575/image With a monthly plan: Pro $0.0551Max $0.0526 | $0.1364/image With a monthly plan: Pro $0.1294Max $0.1223 | — | — |
| 4K | $0.0342/image | $0.5073/image | — | — | — | — | — | — |
Monthly plans lower prices on most models (shown under each price); you can still pay as you go. Pro $499/month · Max $4,999/month.
Try it
Try the FLUX models
Switch models with the tabs. Runs on your balance at the price on the button; failed runs are refunded.
Capabilities
FLUX video capabilities
| Feature | FLUX 3 Video |
|---|---|
| Text to video | Yes |
| Image to video | Yes |
| Resolutions | 720p |
| Clip length | 5–20 s |
| Audio | Included |
| Frames | First + last |
| Aspect ratios | 7 |
| Released | Aug 2026 |
Capabilities
FLUX image models compared
| Feature | FLUX 3 Image Klein | FLUX 3 | FLUX.2 [klein] 4B | FLUX.2 [max] | FLUX.2 [pro] | FLUX.2 [flex] | FLUX.1 Kontext [pro] | FLUX.1 Kontext [max] |
|---|---|---|---|---|---|---|---|---|
| Text to image | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Image editing | Yes | Yes | Yes | — | Yes | — | Yes | Yes |
| Sizes | 768, 1K, 1.5K, 2K, 4K | 1K, 1.5K, 2K, 4K | 1K, 2K | 1 MP, 2 MP, 3 MP, 4 MP | 1 MP, 2 MP, 3 MP, 4 MP | 1 MP, 2 MP, 3 MP, 4 MP | 1K | 1K |
| Edit inputs | Up to 10 | Up to 10 | Up to 4 | — | Up to 8 | — | Up to 4 | Up to 4 |
| Aspect ratios | 16 | 15 | 7 | 9 | 10 | 9 | 9 | 9 |
| Released | Oct 2026 | Oct 2026 | Jan 2026 | Dec 2025 | Nov 2025 | Nov 2025 | May 2025 | May 2025 |
Quick start
Call the FLUX API
One request shape for every FLUX model: POST /v1/run/{endpoint} with your key, then poll the generation or pass a webhook_url. Switching models means changing the endpoint.
| Model | Endpoint |
|---|---|
| FLUX 3 Image Klein · Text to Image | bfl/flux-3-image-klein/text-to-image |
| FLUX 3 Image Klein · Image Edit | bfl/flux-3-image-klein/edit |
| FLUX 3 · Text to Image | bfl/flux-3/text-to-image |
| FLUX 3 · Image Edit | bfl/flux-3/edit |
| FLUX 3 Video · Text to Video | bfl/flux-3-video/text-to-video |
| FLUX 3 Video · Image to Video | bfl/flux-3-video/image-to-video |
| FLUX.2 [klein] 4B · Text to Image | bfl/flux-2-klein-4b/text-to-image |
| FLUX.2 [klein] 4B · Image Edit | bfl/flux-2-klein-4b/edit |
| FLUX.2 [max] · Text to Image | bfl/flux-2-max/text-to-image |
| FLUX.2 [pro] · Text to Image | bfl/flux-2-pro/text-to-image |
| FLUX.2 [pro] · Image Edit | bfl/flux-2-pro/edit |
| FLUX.2 [flex] · Text to Image | bfl/flux-2-flex/text-to-image |
| FLUX.1 Kontext [pro] · Text to Image | bfl/flux-kontext-pro/text-to-image |
| FLUX.1 Kontext [pro] · Image Edit | bfl/flux-kontext-pro/edit |
| FLUX.1 Kontext [max] · Text to Image | bfl/flux-kontext-max/text-to-image |
| FLUX.1 Kontext [max] · Image Edit | bfl/flux-kontext-max/edit |
FLUX 3 Image Klein · Text to Image
const API = "https://cheapergen.com/api/v1";
const headers = {
Authorization: `Bearer ${process.env.CHEAPERGEN_API_KEY}`,
"Content-Type": "application/json",
};
// 1. Submit the job
let job = await fetch(`${API}/run/bfl/flux-3-image-klein/text-to-image`, {
method: "POST",
headers,
body: JSON.stringify({
"prompt": "Editorial still life of a hand-thrown terracotta vase with dried orange ranunculus on a travertine plinth, low golden-hour sun from the left, long soft shadows on a warm plaster wall, medium-format film photograph",
"aspect_ratio": "1:1",
"resolution": "1K"
}),
}).then((r) => r.json());
// 2. Poll until it finishes (or pass webhook_url and skip polling)
while (job.status === "queued" || job.status === "running") {
await new Promise((r) => setTimeout(r, 3000));
job = await fetch(`${API}/generations/${job.id}`, { headers }).then((r) => r.json());
}
console.log(job.status === "succeeded" ? job.output.images[0].url : job.error);Go deeper
Pricing, cost and docs for each FLUX model
FLUX 3 Image Klein
up to 87% below Official
FLUX 3
up to 34% below Official
FLUX 3 Video
8% below the fal API
FLUX.2 [klein] 4B
up to 93% below Official
FLUX.2 [max]
up to 21% below Official
FLUX.2 [pro]
up to 38% below Official
FLUX.2 [flex]
up to 32% below Official
FLUX.1 Kontext [pro]
13% below Official
FLUX.1 Kontext [max]
13% below Official
FAQ
FLUX API questions
FLUX 3, FLUX 3 Video, FLUX.2 [max], FLUX.2 [pro], FLUX.2 [flex], FLUX.1 Kontext [pro] and 1 more are developed by Black Forest Labs; CheaperGen provides API access and does not own them. FLUX 3 Image Klein and FLUX.2 [klein] 4B are Black Forest Labs' open-weights models; CheaperGen provides API access to the open weights, run on GPU inference for open-source models, and does not own them. Trademarks belong to their respective owners.