Flux Kontext Max (by Black Forest Labs)

Overview

High performing text-to-image model with multi-image support and flexible aspect ratios.

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Quick facts

• Modes: Text → Image · Image → Image · Images → Image

• Default output / size: 1024×1024 (1:1)

• Aspect ratios: 21:9, 16:9, 4:3, 3:2, 1:1, 2:3, 3:4, 9:16, 9:21

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What it's great for

• High-quality text-to-image generation with excellent prompt adherence

• Multi-image blending and composition tasks

• Image editing with reference images

• Creative workflows requiring diverse aspect ratios

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Parameters

Control	Type	Default	Notes
Prompt	Text	—	Natural-language instruction (required)
Aspect Ratio	Dropdown	1:1	21:9, 16:9, 4:3, 3:2, 1:1, 2:3, 3:4, 9:16, 9:21 (auto for image inputs)
Seed	Number	Random	Optional for repeatable results

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Modes

Mode	Estimated time	Required inputs	Typical use
Text → Image	~8s	Prompt	Generate images from text
Image → Image	~8s	Prompt, Image	Edit or transform images
Images → Image	~8s	Prompt, Images	Blend up to 5 images

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Output options

Option	Values / notes
Aspect ratio	21:9, 16:9, 4:3, 3:2, 1:1, 2:3, 3:4, 9:16, 9:21

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Prompt tips

• Use specific style descriptors for better results

• Seed values enable reproducible outputs

• For multi-image blending, describe the desired composition clearly

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Safety

Text moderation is applied according to platform rules — avoid disallowed content.

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