FLUX 2 Flex: Reference Image Editing, Priced Per Input
FLUX 2 Flex is Black Forest Labs' reference-driven image model. Combine, restyle, or recompose with up to 10 reference images per generation. Pricing is straightforward: 3 credits for every uploaded reference image — so a 2-reference edit costs 6 credits, a 5-reference edit costs 15. Try FLUX 2 Flex online today.
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Why FLUX 2 Flex Is Different from the Rest of FLUX 2
FLUX 2 Pro and FLUX 2 Max charge per image. FLUX 2 Flex charges per uploaded reference image. That makes Flex the right pick for reference-heavy editing workflows where you need many inputs in a single generation.
Up to 10 Reference Images per Generation
FLUX 2 Flex accepts up to 10 reference inputs in a single run. Useful for assembling a final composition from multiple sources — wardrobe from one reference, lighting from another, location from a third — without stitching the result by hand.
Transparent Per-Reference Pricing
FLUX 2 Flex costs 3 credits for every uploaded reference image. Two references = 6 credits, five references = 15 credits. The badge in the editor reflects the base cost; the actual charge updates as you add references, so there are no surprise bills.
Designed for Editing, Not Just Generation
FLUX 2 Flex is tuned for reference-driven editing — recoloring, recomposing, restyling, and merging visual sources. It is the FLUX 2 model to reach for when the prompt is mostly 'do this to these images', not 'imagine something new'.
Same 4MP Output Ceiling
FLUX 2 Flex supports the same 0.5MP to 4MP resolution range as FLUX 2 Pro and FLUX 2 Max. Edits that started as a quick reference combine can ship as 2MP web assets or 4MP hero images from the same generation.
Full Aspect Ratio Coverage
Square, 16:9, 9:16, 3:2, 2:3, 4:3, 3:4, 4:5, 5:4, plus match-input. FLUX 2 Flex handles the same aspect ratios as the rest of FLUX 2 — so reference-edited images slot into the same layouts as your generated assets.
Stays Inside the FLUX 2 Family
FLUX 2 Flex is built by Black Forest Labs alongside FLUX 2 Pro and FLUX 2 Max. Color response, prompt language, and reference handling feel consistent with the rest of the family — easy to mix and match in the same project.
What FLUX 2 Flex Is Built For
FLUX 2 Flex is the FLUX 2 model for reference-heavy editing — when you have multiple sources to combine and need them merged in one generation.
Wardrobe & Style Merging
Stylists and editorial teams use FLUX 2 Flex to combine wardrobe from one reference, lighting from another, and a model from a third — getting a unified frame in a single generation instead of three rounds of compositing.
Product Recomposition
Brand teams use FLUX 2 Flex to reframe a product across multiple settings — same packshot, different environments, lighting, and props — by mixing the product reference with environment references in one shot.
Restyling & Color Treatment
Designers use FLUX 2 Flex to apply a color or treatment from a reference image to a base composition. Useful for moodboarding, color exploration, and producing on-brand variations of an existing asset.
How to Use FLUX 2 Flex in Three Steps
FLUX 2 Flex is one model away in the same Sketchto editor. Pricing is shown per generation as you add references.
Sign In and Claim Free Credits
Create a Sketchto account to receive free trial credits. Free credits work on FLUX 2 Flex — at 3 credits per uploaded reference image, plan reference count accordingly.
Upload References and Describe the Edit
Upload up to 10 reference images, then describe what to do with them. FLUX 2 Flex is most useful when the prompt is specific about which reference contributes which element — wardrobe, lighting, color, composition.
Generate at Your Chosen Size
Pick aspect ratio and resolution, then hit Generate. The editor shows the per-image credit cost based on how many references you uploaded — 2 refs = 6 credits, 5 refs = 15 credits, no surprise bills.
Tips for Better FLUX 2 Flex Results
Be intentional about reference count:
Each uploaded reference image adds 3 credits. Add references that genuinely contribute to the edit — extra references that overlap in role do not improve the result and do raise the bill.
Spell out which reference contributes what:
FLUX 2 Flex responds well to prompts like 'wardrobe from reference 1, lighting from reference 2, composition from reference 3'. The clearer the role per reference, the cleaner the merge.
Use Pro for text-only generation:
If you do not need references, FLUX 2 Pro at 1 credit per image is cheaper. Save FLUX 2 Flex for the workflows where you actually have multiple sources to combine.
What Users Say About FLUX 2 Flex
“FLUX 2 Flex replaced two rounds of Photoshop comping for me. I drop in the wardrobe shot, the location, and a model reference, and it returns a single coherent frame. The 3-credit-per-reference math is easy to budget.”
Eva Schneider
Editorial Stylist
“We use FLUX 2 Flex for product variants. One packshot, three environment references, one generation, three to four credits per reference — beats running and cleaning real shoots for every backdrop.”
Tomas Oliveira
E-commerce Producer
“What I like about FLUX 2 Flex is the pricing is honest. You see the credit count update as you add references. No surprise bill at the end of the month from a per-megapixel meter you forgot about.”
Hana Suzuki
Art Director
“I default to FLUX 2 Pro for generation and switch to FLUX 2 Flex the moment I have more than one reference image to combine. The model knows what to do with multi-input prompts in a way Pro does not.”
Andre Lefevre
Visual Designer
FLUX 2 Flex — Frequently Asked Questions
What you need to know before using FLUX 2 Flex on Sketchto