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FLUX1.1 Pro costs $0.040 per image at any size: $4.00 for 100 images and $40.00 for 1,000. With three attempts per image you keep, each usable image costs $0.120.
Black Forest Labs charges a flat $0.040 per image for FLUX1.1 Pro, whatever the size or aspect ratio you ask for.
What decides the bill is not the price per image but how many attempts it takes to get one you keep. At three attempts per keeper, 100 usable images a month cost $12.00. At the calculator’s default setting, the other image models listed here cost per image: GPT Image 1 mini ($0.011), Gemini 3.1 Flash Lite Image ($0.0336), FLUX.1 Kontext Pro ($0.040), Grok Imagine Image 2.0 ($0.040), GPT Image 1 ($0.042), Gemini 3.1 Flash Image ($0.067), Gemini 3 Pro Image ($0.134). Prices are from the providers’ own price lists, checked on September 11, 2026. The calculator below opens with FLUX1.1 Pro selected — set your own volume and attempts.
What GPT Image, Gemini and Nano Banana Really Cost
Monthly cost
60 images generated a month
Per generated image
$0.042
What the provider charges for one press of the button
Per image you keep
$0.126
Including the 3 attempts it takes
Spent on discarded attempts
$1.68
67% of the bill is images nobody uses — the number a price list never shows you
If you keep this up
| Model | Per image | Per month |
|---|---|---|
| GPT Image 1 mini | $0.011 | $0.66 |
| Grok Imagine Image | $0.020 | $1.20 |
| Gemini 3.1 Flash Lite Image | $0.034 | $2.02 |
| Gemini 2.5 Flash Image | $0.039 | $2.34 |
| FLUX1.1 [pro] | $0.040 | $2.40 |
| FLUX.1 Kontext [pro] | $0.040 | $2.40 |
| Grok Imagine Image 2.0 | $0.040 | $2.40 |
| GPT Image 1 | $0.042 | $2.52 |
| FLUX.1 Fill [pro] | $0.050 | $3.00 |
| Grok Imagine Image (quality) | $0.050 | $3.00 |
| FLUX1.1 [pro] Ultra | $0.060 | $3.60 |
| Gemini 3.1 Flash Image | $0.067 | $4.02 |
| FLUX.1 Kontext [max] | $0.080 | $4.80 |
| Gemini 3 Pro Image | $0.134 | $8.04 |
Every model priced on the same request. Where a provider does not publish your exact frame, the nearest one it does is used and the row says so. Cheapest first.
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List prices as of September 11, 2026. The last column assumes three generations for every image you keep.
| Setting | Per image | 100 images | 1,000 images | Per kept image |
|---|---|---|---|---|
| Any size | $0.040 | $4.00 | $40.00 | $0.120 |
Models