How many reference images can FLUX.2 use?

FLUX.2 Pro, Max, and Flex each accept up to 8 reference-image URLs. The URLs must be publicly accessible.

Which FLUX.2 variant should I choose?

Choose Pro for balanced speed, quality, and cost, Max when the highest output quality matters most, and Flex when you need adjustable steps, guidance, or stronger layout control.

Can every FLUX.2 model adjust steps and guidance?

No. These controls are exclusive to flux-2-flex: steps accepts 1–50 and guidance accepts 1.5–10. Pro and Max do not expose them.

What output sizes and formats are supported?

Use 1MP, 2MP, 3MP, or 4MP with any of 9 ratios, or provide width and height of at least 64 px with a total output limit of 4 MP. Formats are PNG, JPEG, and WebP.

How does the asynchronous API work?

POST /v1/images/generations returns a task ID. Poll GET /v1/tasks/{task_id} until the task is completed or failed; each task returns one image.

How is FLUX.2 priced, and what happens if a task fails?

The charge depends on the selected output tier or exact dimensions and the number of reference images. Use the completed task's cost field as the source of truth. Failed tasks are automatically refunded in full.

Is there a discount on the FLUX.2 API?

Yes. Prices shown on this page are Gold member prices, already 20% off. Platinum and Diamond members save even more, up to 28%, and you only pay for successful requests.

How do I get a FLUX.2 API key?

Sign up for APIMart, open the API Keys page in your dashboard and create a new key. The same key calls the Black Forest Labs FLUX.2 API and every other model on the platform, with pay-as-you-go billing and no subscription.

Is the Flux 2 API the same as the FLUX.2 API?

Yes. Flux 2 is a common way to write FLUX.2, Black Forest Labs' image family with Pro, Max and Flex variants. On APIMart, call the Flux 2 API by setting model to flux-2-pro, flux-2-max or flux-2-flex. FLUX.1 Kontext (flux-kontext-pro and flux-kontext-max) is also available with the same API key.

FLUX.2 API: Pro, Max & Flex Images, 20% Off

Output image

Output billing uses the 1MP, 2MP, 3MP, and 4MP tiers.

Output image. Output billing uses the 1MP, 2MP, 3MP, and 4MP tiers.
Variant	Tier	GoldCurrent price	Platinum	Diamond	Official	Your savings
`flux-2-pro`	1MP	0.24Credits(~$0.024)	0.228Credits(~$0.0228)	0.216Credits(~$0.0216)	0.3Credits(~$0.03)	20%
	2MP	0.36Credits(~$0.036)	0.342Credits(~$0.0342)	0.324Credits(~$0.0324)	0.45Credits(~$0.045)	20%
	3MP	0.48Credits(~$0.048)	0.456Credits(~$0.0456)	0.432Credits(~$0.0432)	0.6Credits(~$0.06)	20%
	4MP	0.6Credits(~$0.06)	0.57Credits(~$0.057)	0.54Credits(~$0.054)	0.75Credits(~$0.075)	20%
`flux-2-max`	1MP	0.56Credits(~$0.056)	0.532Credits(~$0.0532)	0.504Credits(~$0.0504)	0.7Credits(~$0.07)	20%
	2MP	0.8Credits(~$0.08)	0.76Credits(~$0.076)	0.72Credits(~$0.072)	1Credits(~$0.1)	20%
	3MP	1.04Credits(~$0.104)	0.988Credits(~$0.0988)	0.936Credits(~$0.0936)	1.3Credits(~$0.13)	20%
	4MP	1.28Credits(~$0.128)	1.216Credits(~$0.1216)	1.152Credits(~$0.1152)	1.6Credits(~$0.16)	20%
`flux-2-flex`	1MP	0.4Credits(~$0.04)	0.38Credits(~$0.038)	0.36Credits(~$0.036)	0.5Credits(~$0.05)	20%
	2MP	0.8Credits(~$0.08)	0.76Credits(~$0.076)	0.72Credits(~$0.072)	1Credits(~$0.1)	20%
	3MP	1.2Credits(~$0.12)	1.14Credits(~$0.114)	1.08Credits(~$0.108)	1.5Credits(~$0.15)	20%
	4MP	1.6Credits(~$0.16)	1.52Credits(~$0.152)	1.44Credits(~$0.144)	2Credits(~$0.2)	20%

Reference images

A single reference image uses its actual pixel tier, up to 4MP. With two or more images, each is billed at 1MP.

Reference images. A single reference image uses its actual pixel tier, up to 4MP. With two or more images, each is billed at 1MP.
Variant	Tier	GoldCurrent price	Platinum	Diamond	Official	Your savings
`flux-2-pro`	1MP	0.12Credits(~$0.012)	0.114Credits(~$0.0114)	0.108Credits(~$0.0108)	0.15Credits(~$0.015)	20%
	2MP	0.24Credits(~$0.024)	0.228Credits(~$0.0228)	0.216Credits(~$0.0216)	0.3Credits(~$0.03)	20%
	3MP	0.36Credits(~$0.036)	0.342Credits(~$0.0342)	0.324Credits(~$0.0324)	0.45Credits(~$0.045)	20%
	4MP	0.48Credits(~$0.048)	0.456Credits(~$0.0456)	0.432Credits(~$0.0432)	0.6Credits(~$0.06)	20%
`flux-2-max`	1MP	0.24Credits(~$0.024)	0.228Credits(~$0.0228)	0.216Credits(~$0.0216)	0.3Credits(~$0.03)	20%
	2MP	0.48Credits(~$0.048)	0.456Credits(~$0.0456)	0.432Credits(~$0.0432)	0.6Credits(~$0.06)	20%
	3MP	0.72Credits(~$0.072)	0.684Credits(~$0.0684)	0.648Credits(~$0.0648)	0.9Credits(~$0.09)	20%
	4MP	0.96Credits(~$0.096)	0.912Credits(~$0.0912)	0.864Credits(~$0.0864)	1.2Credits(~$0.12)	20%
`flux-2-flex`	1MP	0.4Credits(~$0.04)	0.38Credits(~$0.038)	0.36Credits(~$0.036)	0.5Credits(~$0.05)	20%
	2MP	0.8Credits(~$0.08)	0.76Credits(~$0.076)	0.72Credits(~$0.072)	1Credits(~$0.1)	20%
	3MP	1.2Credits(~$0.12)	1.14Credits(~$0.114)	1.08Credits(~$0.108)	1.5Credits(~$0.15)	20%
	4MP	1.6Credits(~$0.16)	1.52Credits(~$0.152)	1.44Credits(~$0.144)	2Credits(~$0.2)	20%

FLUX.2

FLUX.2 API Pricing

FLUX.2 API — Pro, Max & Flex

FLUX.2 API Capabilities

FLUX.2 Use Cases

Get Started with FLUX.2

Create an account and add funds

Generate an API key

Submit and poll your first task

Flux 2 Customer Stories

FLUX.2 API FAQ

Related Models