CheaperGen

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.

FLUX API: video models, specs and prices. Select a column header to sort.
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.

FLUX API: image models, specs and prices. Select a column header to sort.
FLUX 3
Black Forest LabsAPI pricingAPI cost
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.

What matters most
I need

Your FLUX pick

FLUX.2 [klein] 4B

From $0.001/image

  • The lowest starting price: $0.001/image
Details →

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.

FLUX prices by model and size
SizeFLUX 3 Image KleinFLUX 3FLUX.2 [klein] 4BFLUX.2 [max]FLUX.2 [pro]FLUX.2 [flex]FLUX.1 Kontext [pro]FLUX.1 Kontext [max]
768$0.0011/image$0.008
With a monthly plan: Max $0.001
———————
1K$0.0019/image$0.009
With a monthly plan: Pro $0.0018Max $0.0017
$0.0317/image$0.048$0.001/image$0.014
With a monthly plan: Max $0.0009
$0.0644/image$0.07$0.0276/image$0.03$0.046/image$0.05$0.0348/image$0.04
With a monthly plan: Pro $0.0341Max $0.0333
$0.0695/image$0.08
With a monthly plan: Pro $0.0681Max $0.0666
2 MP———$0.0889/image$0.10
With a monthly plan: Pro $0.0877Max $0.0865
$0.0396/image$0.045
With a monthly plan: Pro $0.039Max $0.0383
$0.0861/image$0.10
With a monthly plan: Pro $0.0841Max $0.0821
——
1.5K$0.0043/image$0.011
With a monthly plan: Pro $0.004Max $0.0038
$0.0644/image$0.07——————
3 MP———$0.1091/image$0.13
With a monthly plan: Pro $0.1059Max $0.1027
$0.0493/image$0.06
With a monthly plan: Pro $0.0477Max $0.0461
$0.115/image$0.15
With a monthly plan: Pro $0.1101Max $0.1052
——
2K$0.0074/image$0.014
With a monthly plan: Pro $0.0069Max $0.0065
$0.092/image$0.10$0.0038/image$0.0172
With a monthly plan: Pro $0.0037Max $0.0036
$0.1263/image$0.16
With a monthly plan: Pro $0.1214Max $0.1165
$0.0575/image$0.075
With a monthly plan: Pro $0.0551Max $0.0526
$0.1364/image$0.20
With a monthly plan: Pro $0.1294Max $0.1223
——
4K$0.0342/image$0.036$0.5073/image$0.607——————

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

FLUX video capabilities
FeatureFLUX 3 Video
Text to videoYes
Image to videoYes
Resolutions720p
Clip length5–20 s
AudioIncluded
FramesFirst + last
Aspect ratios7
ReleasedAug 2026

Capabilities

FLUX image models compared

FLUX image capabilities
FeatureFLUX 3 Image KleinFLUX 3FLUX.2 [klein] 4BFLUX.2 [max]FLUX.2 [pro]FLUX.2 [flex]FLUX.1 Kontext [pro]FLUX.1 Kontext [max]
Text to imageYesYesYesYesYesYesYesYes
Image editingYesYesYes—Yes—YesYes
Sizes768, 1K, 1.5K, 2K, 4K1K, 1.5K, 2K, 4K1K, 2K1 MP, 2 MP, 3 MP, 4 MP1 MP, 2 MP, 3 MP, 4 MP1 MP, 2 MP, 3 MP, 4 MP1K1K
Edit inputsUp to 10Up to 10Up to 4—Up to 8—Up to 4Up to 4
Aspect ratios16157910999
ReleasedOct 2026Oct 2026Jan 2026Dec 2025Nov 2025Nov 2025May 2025May 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.

FLUX endpoints
ModelEndpoint
FLUX 3 Image Klein · Text to Imagebfl/flux-3-image-klein/text-to-image
FLUX 3 Image Klein · Image Editbfl/flux-3-image-klein/edit
FLUX 3 · Text to Imagebfl/flux-3/text-to-image
FLUX 3 · Image Editbfl/flux-3/edit
FLUX 3 Video · Text to Videobfl/flux-3-video/text-to-video
FLUX 3 Video · Image to Videobfl/flux-3-video/image-to-video
FLUX.2 [klein] 4B · Text to Imagebfl/flux-2-klein-4b/text-to-image
FLUX.2 [klein] 4B · Image Editbfl/flux-2-klein-4b/edit
FLUX.2 [max] · Text to Imagebfl/flux-2-max/text-to-image
FLUX.2 [pro] · Text to Imagebfl/flux-2-pro/text-to-image
FLUX.2 [pro] · Image Editbfl/flux-2-pro/edit
FLUX.2 [flex] · Text to Imagebfl/flux-2-flex/text-to-image
FLUX.1 Kontext [pro] · Text to Imagebfl/flux-kontext-pro/text-to-image
FLUX.1 Kontext [pro] · Image Editbfl/flux-kontext-pro/edit
FLUX.1 Kontext [max] · Text to Imagebfl/flux-kontext-max/text-to-image
FLUX.1 Kontext [max] · Image Editbfl/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

FAQ

FLUX API questions

FLUX is Black Forest Labs' family of AI video and image models. Through CheaperGen you call all 9 of them — FLUX 3 Image Klein, FLUX 3, FLUX 3 Video, FLUX.2 [klein] 4B, FLUX.2 [max], FLUX.2 [pro] and 3 more — with one API key: POST /v1/run/{endpoint}, then poll the generation or receive a webhook. What each version does: FLUX AI; the newest: FLUX Latest.

FLUX 3 Video starts at $0.1564/s, so a 5-second clip costs $0.79. Image models start at $0.001/image (FLUX.2 [klein] 4B) — up to 93% below Black Forest Labs' official price. Pay as you go from prepaid credits; failed generations are refunded.

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.

Create a CheaperGen account, add credits and create a key in Dashboard → API keys. The same key runs every FLUX model and the other 36 models in the catalog; you don't need a Black Forest Labs account. Step by step: FLUX 3 Image Klein API key.

Yes. FLUX 3 Image Klein, FLUX 3, FLUX 3 Video, FLUX.2 [klein] 4B, FLUX.2 [max], FLUX.2 [pro] and 3 more are developed by Black Forest Labs; CheaperGen provides API access — the same models and output, at a lower price — and doesn't own them.

FLUX 3 Video generates synchronized audio at no extra cost. The highest resolution is 720p (FLUX 3 Video).

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.