Image model comparison

FLUX.2 [pro] vs FLUX.2 [flex]

Black Forest Labs' FLUX.2 [pro] and Black Forest Labs' FLUX.2 [flex], side by side: price per image, image sizes, editing and aspect ratios — and when to choose which. Both run on one Cheaper Gen. API key.

Black Forest Labs

Up to −36%

FLUX.2[pro]

FLUX.2 [pro]

Black Forest Labs' production image model — photoreal, fast, up to 4 MP

from

$0.0264/image

Black Forest Labs

Up to −12%

FLUX.2[flex]

FLUX.2 [flex]

FLUX.2 with adjustable steps and guidance — best for text and fine detail

from

$0.044/image

Price

FLUX.2 [pro] vs FLUX.2 [flex]: price per image

Live prices at the tiers both models offer. Official list prices are on each model's pricing page.

FLUX.2 [pro] and FLUX.2 [flex] prices at shared tiers
Tier	FLUX.2 [pro]	FLUX.2 [flex]	Cheaper
1K	$0.0264/image	$0.044/image	FLUX.2 [pro] −40%
2 MP	$0.0396/image	$0.088/image	FLUX.2 [pro] −55%
3 MP	$0.0385/image	$0.132/image	FLUX.2 [pro] −71%
4 MP	$0.066/image	$0.176/image	FLUX.2 [pro] −63%

FLUX.2 [pro] pricing →Cheap FLUX.2 [pro] API →FLUX.2 [flex] pricing →Cheap FLUX.2 [flex] API →

Specs

Side-by-side specifications

From each model's API parameters in our catalog.

FLUX.2 [pro] vs FLUX.2 [flex] specifications
Spec	FLUX.2 [pro]	FLUX.2 [flex]
Developer	Black Forest Labs	Black Forest Labs
Released	Nov 25, 2025	Nov 25, 2025
Tasks	Text to image, Image editing	Text to image
Sizes	1 MP · 2 MP · 3 MP · 4 MP	1 MP · 2 MP · 3 MP · 4 MP
Edit inputs	Up to 8 images	—
Quality levels	—	—
Aspect ratios	10 (1:1, 4:3, 3:4, 16:9, 9:16, 3:2…)	9 (1:1, 4:3, 3:4, 16:9, 9:16, 3:2…)
Starting price	$0.0264/image (1 MP)	$0.044/image (1 MP)
Below official price	up to 36%	up to 12%

Verdict

When to choose which

Each point below comes from the price and spec data above.

Choose FLUX.2 [pro] for

Lower price: $0.0264/image vs $0.044/image at 1K (40% less).
Edits with up to 8 input images.
More aspect ratios: 10 vs 9.
Supports image edit.

FLUX.2 [pro] at a glance

Up to 4 MP — 1–4 megapixel output
Clean text — Logos and labels
Fast — Seconds per image
Per-MP pricing — Pay for the size you need

Choose FLUX.2 [flex] for

The same tasks at a similar price — pick by output style; try both in the Studio.

FLUX.2 [flex] at a glance

Steps & guidance — Tune quality vs speed
Typography — Strong text rendering
Up to 4 MP — 1–4 megapixel output
Per-MP pricing — Pay for the size you need

Try both with the same prompt

Same API key and balance; only the endpoint changes. Failed generations are refunded.

POST /api/v1/run/bfl/flux-2-pro/text-to-image
POST /api/v1/run/bfl/flux-2-flex/text-to-image

FLUX.2 [pro] in Studio FLUX.2 [flex] in Studio

FAQ

FLUX.2 [pro] vs FLUX.2 [flex] questions

FLUX.2 [pro] is cheaper at 4 of 4 shared tiers. 1K: FLUX.2 [pro] $0.0264/image, FLUX.2 [flex] $0.044/image; 2 MP: FLUX.2 [pro] $0.0396/image, FLUX.2 [flex] $0.088/image; 3 MP: FLUX.2 [pro] $0.0385/image, FLUX.2 [flex] $0.132/image; 4 MP: FLUX.2 [pro] $0.066/image, FLUX.2 [flex] $0.176/image. Prices are live and billed per image.

FLUX.2 [pro]: up to 4 MP, edits with up to 8 input images. FLUX.2 [flex]: up to 4 MP, text-to-image only.

Yes. Both run through the same Cheaper Gen. API and balance: POST /v1/run/{endpoint} with the model's endpoint id, then poll or receive a webhook. Switching models means changing the endpoint and its input fields — no new account or SDK.

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All comparisons →All AI image APIs →Cheapest image APIs →

FLUX.2 [pro] is developed by Black Forest Labs; FLUX.2 [flex] by Black Forest Labs. Cheaper Gen. provides API access to both through official upstream endpoints and does not own either model. Trademarks belong to their respective owners.