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/IMAGE/flux-3-image
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Black Forest Labs

FLUX 3 Image API

Generate and edit images with up to 10 references, flexible framing, web search and resolution tiers up to 4K.

  • Text to image
  • Image editing
Try modelGet API KeyDocumentation

Starting at

$0.06

per generation

5 parameters · 5 price options

FLUX 3 Image playground

Input

Text description or image editing instructions. Layout and bounding-box instructions may be included in the prompt.

Reference image URLs for editing or multi-image guidance (up to 10 images). Omit for text-to-image generation.

Sign in to run

Runs are charged to your balance.

Output

Output will appear here.

Fill in the fields, review the cost and run the model. Your result will appear here; you do not need a separate API key to try it in your browser.

FLUX 3 Image API pricing

OptionPrice per generation
1K$0.06
768SQ$0.05
1.5K$0.08
2K$0.12
4K$0.7

Quick start

Full API reference →
1curl -X POST https://api.api-stock.com/api/v1/generation/create \
2  -H "Authorization: Bearer $API_STOCK_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{
5    "model": "flux-3-image",
6    "input": {
7      "prompt": "A cinematic shot of a city at dusk",
8      "size": "auto",
9      "resolution": "1K",
10      "grounding": true
11    }
12  }'

Parameters

NameTypeRequiredDefaultDescription
promptstringYes—Text description or image editing instructions. Layout and bounding-box instructions may be included in the prompt.
urlsstring[]No—Reference image URLs for editing or multi-image guidance (up to 10 images). Omit for text-to-image generation.
sizestringNoautoImage aspect ratio. Auto follows the first reference image, or the prompt when generating from text.One of: auto, 21:9, 2:1, 16:9, 3:2, 7:5, 4:3, 5:4, 1:1, 4:5, 3:4, 5:7, 2:3, 9:16, 1:2, 9:21
resolutionstringNo1KOutput resolution tier; determines the per-image price.One of: 768SQ, 1K, 1.5K, 2K, 4K
groundingbooleanNotrueAllow web and image search before generation. Reference images and search do not add a separate charge.

Frequently asked questions

How much does FLUX 3 Image cost?

FLUX 3 Image starts at $0.06 per generation through the API Stock API. You pay per use from a single prepaid balance — there is no subscription — and the final price scales with parameters such as resolution or duration.

When was FLUX 3 Image released?

FLUX 3 Image was released on October 8, 2026. It is available through the API Stock API with the same key and prepaid balance as every other model.

How do I get an API key for FLUX 3 Image?

Sign up for API Stock, top up your balance using an available payment method and create an API key in the dashboard — it takes a couple of minutes and needs no contract. The same key works with every model in the catalog, so there is no separate key to obtain for FLUX 3 Image.

How do I call the FLUX 3 Image API?

Send a POST request to https://api.api-stock.com/api/v1/generation/create with your API key and the model id "flux-3-image". The call returns a task id you poll, or a webhook callback when the result is ready. A ready-to-run example is in the quick start above.

What input parameters does FLUX 3 Image accept?

FLUX 3 Image accepts 5 input parameters, including the required field(s) prompt. Their types, defaults and allowed values are listed in the parameters table above.

What happens if a FLUX 3 Image request fails?

API Stock automatically retries the request on a reserve provider. If every provider fails, the charge is refunded to your balance.

Can I use FLUX 3 Image with the same API key as other models?

Yes. Every model on API Stock — video, image, music and chat — shares one API key and one prepaid balance, so you can switch to FLUX 3 Image without new credentials.

Other Image models

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