AI image models · compared
Flux 3 Image vs Flux 3 Image Klein
Flux 3 Image and Flux 3 Image Klein are both AI image models that run on one varg API key. This page puts what the varg catalog states about each side by side: the price, how it is billed, what it takes and the typical time. It ranks neither on quality.
- Flux 3 Image
- From $0.02 per run $0.048/MP
- Flux 3 Image Klein
- From $0.01 per run from $0.01/image
Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01.
Flux 3 Image vs Flux 3 Image Klein: side by side
Every row is read from the varg catalog and each model's input schema. A "from" price is the cheapest request the catalog states for that model, at its own cheapest settings. For the exact price of a request, send its body to POST https://api.varg.ai/v2/estimate.
| Fact | Flux 3 Image | Flux 3 Image Klein |
|---|---|---|
| Made by | Black Forest Labs | Black Forest Labs |
| Takes and makes | Text to image, Image to image | Text to image, Image to image |
| Price | From $0.02 per run | From $0.01 per run |
| Rates on the cheapest route | Per megapixel: $0.048; Minimum charge: $0.02 | Image size square_hd: $0.01/image; Image size square: $0.01/image; Image size portrait_4_3: $0.01/image; Image size portrait_16_9: $0.01/image; Image size landscape_4_3: $0.01/image; Image size landscape_16_9: $0.01/image; Other: $0.01/image; Minimum charge: $0.01 |
| Billed | per megapixel | per image |
| Typical time | ~30 s | ~5 s |
| Routes | 2 on fal | 3 on fal and bfl |
| Model id | flux_3_image | flux_3_image_klein |
Which to pick
Each line is a difference between two rows of the table. None of it says which model's output looks better: that depends on the prompt.
Pick Flux 3 Image when
you prefer its output. On price, limits and inputs the catalog states no advantage for Flux 3 Image over Flux 3 Image Klein, so run one prompt on both and compare.
Pick Flux 3 Image Klein when
- you want the lower starting price: from $0.01 per run, against from $0.02 per run, each at the model's own cheapest settings.
- you want the shorter typical wait: ~5 s, against ~30 s, by the catalog's estimates.
Call Flux 3 Image and Flux 3 Image Klein
One endpoint and one API key for both: POST https://api.varg.ai/v2/tools/image/call with Authorization: Bearer $VARG_API_KEY. It answers 202 with a job right away; poll GET /v2/jobs/{id} until its status is completed.
Flux 3 Image
curl -X POST https://api.varg.ai/v2/tools/image/call \
-H "Authorization: Bearer $VARG_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "flux_3_image",
"prompt": "A red fox leaping over a stream in a pine forest, low-angle wildlife photograph."
}'vargai call_tool --tool image '{"model":"flux_3_image","prompt":"A red fox leaping over a stream in a pine forest, low-angle wildlife photograph."}'Flux 3 Image Klein
curl -X POST https://api.varg.ai/v2/tools/image/call \
-H "Authorization: Bearer $VARG_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "flux_3_image_klein",
"prompt": "A woman in black with glowing orange shield sunglasses holds a glass Klein bottle, black-and-white concrete room, orange light through window blinds."
}'vargai call_tool --tool image '{"model":"flux_3_image_klein","prompt":"A woman in black with glowing orange shield sunglasses holds a glass Klein bottle, black-and-white concrete room, orange light through window blinds."}'How billing works
Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01. varg's fee is on the top-up, not on the run: 5.5% of the credits you buy ($0.80 at the least), or 8% for a team workspace. Pricing
Flux 3 Image vs Flux 3 Image Klein: questions
- Which is cheaper, Flux 3 Image or Flux 3 Image Klein?
- Flux 3 Image Klein starts lower: from $0.01 per run, against from $0.02 per run for Flux 3 Image. Those are each model's cheapest settings, and the price of a request depends on what it asks for: the table lists each model's rates. For the exact price of a request before you run it, send the same body to POST https://api.varg.ai/v2/estimate.
- Can I use Flux 3 Image and Flux 3 Image Klein with one API key?
- Yes. Both run on varg behind POST https://api.varg.ai/v2/tools/image/call with one API key and one credit balance: send "model": "flux_3_image" or "model": "flux_3_image_klein". Every model is billed at its provider's price with no markup, from one credit balance: 1 credit is $0.01.