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ImageBlack Forest Labs

Flux 2 Flex

Flux 2 Flex is the flexible Black Forest Labs tier, trading some of Pro's precision for a wider range of looks. Reach for it when Pro's house style is not what the picture needs.

Resolutions1K, 2K
Aspect ratios1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3
Reference inputsUp to 4
Make with Flux 2 Flex →View pricing

Added July 2026. Included on every plan.

Why this one

What makes Flux 2 Flex different

  1. A wider stylistic rangeWhere Pro has a consistent editorial look, Flex moves further on the same prompt.
  2. References supportedUp to 4 stills to pull a variable render back toward a target.
  3. Eight images per runRange plus batching is the combination: generate a spread and choose.
  4. Seven aspect ratiosThe same framing menu as Pro, so work translates.
  5. Both resolution tiersA draft tier and a finishing tier with a real price difference.
  6. Prompt compatible with ProNothing needs rewriting when you move between the two.

Use cases

Best for

  • Style exploration
  • Varied image sets
  • Concept art
  • Mood boards
  • Editorial variants
  • Creative direction

Technique

Prompt tips

  1. Let it range on the first passGenerate a batch with a loose prompt to see the spread before you constrain it.
  2. Then pin it with referencesUp to 4 stills is the tool for pulling a wide render toward a specific look.
  3. Name the medium explicitlyFlex moves more on medium words than Pro does, which is useful when you use it deliberately.
  4. Draft at the lower tierResolution is a meaningful price step here.
  5. Switch to Pro when you want repeatabilityIf the spread has become a problem rather than a feature, Pro is the tighter model.

Mechanism

How Flux 2 Flex works

Flex runs the Flux pipeline with a looser configuration, so a single prompt produces a broader spread of interpretations than Pro does. Combined with an eight image batch, that makes it an exploration tool: you are buying range on the first pass and narrowing it with references on the second.

Getting started

How to use it on Dolly

  1. Pick Flux 2 FlexChoose it in the image studio, or just ask the agent for it by name.
  2. Write the promptDescribe what you want, and add your reference images or frames where they help.
  3. GenerateThe exact credit cost sits on the button before you press it, and a failed run refunds automatically.

Pricing

What it costs

Every generation shows its exact credit cost on the button before you run it.

1K
12 credits
2K
20 credits

One run is about 1/104 of a Starter month.

Failed generations refund automatically. See plans

Capabilities

Specs

Resolutions
1K, 2K
Aspect ratios
1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3
Reference images
Up to 4
Max per run
8

Questions

Flux 2 Flex FAQ

How is it different from Flux 2 Pro?
Flex ranges wider on the same prompt. Pro is tighter, more precise and cheaper.
Why would I pay more for less precision?
Because exploration is worth paying for when you do not yet know what the image should look like.
How many references?
Up to 4 per run, which is the main tool for pulling a wide render back toward a specific look.
How many images per run?
Up to 8, which is what makes the wider spread useful: you see the range in one batch rather than across eight separate runs.
Can I move a prompt between Flex and Pro?
Yes, the input surface is the same on both, so switching tiers is a model change rather than a rewrite.

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Ready to make with Flux 2 Flex?

Every model is included on every plan. The price sits on the button before you run it.

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