FLUX 3: AI Image Generator

Generate photorealistic images from text with FLUX 3, Black Forest Labs' new frontier model. Coming soon on Muapi — join early access, no subscription.

Interactive model controls

FLUX 3 Text-to-Image is Black Forest Labs' next-generation multimodal frontier model, jointly trained across image, video, and audio for outputs that are truer to life in every style. It generates highly photorealistic and stylistically flexible images from text prompts, with sharper detail, more coherent composition, and stronger prompt adherence than the FLUX.2 generation.

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Overview

About this model

FLUX 3 Text-to-Image is Black Forest Labs' newest frontier model, announced as a unified multimodal system trained jointly across image, video, and audio data. Unlike prior FLUX generations that focused solely on still images, FLUX 3 shares its underlying architecture with FLUX 3 Video and FLUX 3 Action, giving it a stronger grasp of real-world physics, lighting, and composition. Early testers including Canva, Magnific, Krea, and Picsart report sharper detail and more coherent scene layouts than FLUX.2 Pro. Muapi is bringing FLUX 3 Text-to-Image online as soon as Black Forest Labs opens general access, alongside FLUX Kontext for editing workflows.

1Marketing: Generate campaign visuals and hero images from a creative brief.

2Concept Art: Explore photorealistic environment and character concepts quickly.

3E-commerce: Produce product mockups and lifestyle imagery from text descriptions.

4Social Media: Create scroll-stopping visuals for posts and ads at any aspect ratio.

5Game Design: Visualize world and prop concepts before committing to 3D asset production.

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Pricing & Value

Cost analysis

Provider	Cost	Notes
muapi	TBD at launch	Coming soon — early access via Black Forest Labs, general availability pricing not yet published.
Fal.ai	Not available	FLUX 3 is not yet available on Fal.ai.
Replicate	Not available	FLUX 3 is not yet available on Replicate.

muapiTBD at launch

Coming soon — early access via Black Forest Labs, general availability pricing not yet published.

Fal.aiNot available

FLUX 3 is not yet available on Fal.ai.

ReplicateNot available

FLUX 3 is not yet available on Replicate.

** Competitor pricing is estimated based on similar model architectures and usage tiers.

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Technical Details

Configuration schema

Parameter	Type	Description	Default
Prompt	string	Text prompt describing the image. Supports long, richly detailed descriptions.	`A hyperrealistic portrait of an astronaut standing on red Martian dunes at golden hour, dust particles catching the light, ultra-detailed suit reflections, cinematic depth of field.`
Aspect Ratio	Enum (8 options)	Aspect ratio of the output image.	`1:1`
Resolution	Enum (3 options)	Target resolution of the generated image.	`2k`

Promptstring

Text prompt describing the image. Supports long, richly detailed descriptions.

Default Value

A hyperrealistic portrait of an astronaut standing on red Martian dunes at golden hour, dust particles catching the light, ultra-detailed suit reflections, cinematic depth of field.

Aspect RatioEnum (8 options)

Aspect ratio of the output image.

Default Value1:1

ResolutionEnum (3 options)

Target resolution of the generated image.

Default Value2k

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Implementation Guide

Developer documentation

How to Use FLUX 3 Text-to-Image (Early Access)

Write a detailed prompt — describe subject, lighting, composition, and style. FLUX 3 responds well to specific, cinematic language.
Set aspect_ratio and resolution — choose from 16:9, 9:16, 1:1, 4:3, 3:4, 2:3, 3:2, or 21:9, at up to 4k.
Submit the request — once live, call the endpoint below and poll for the result:

curl -X POST https://api.muapi.ai/api/v1/flux-3-text-to-image \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"prompt": "A hyperrealistic portrait of an astronaut on Martian dunes at golden hour", "aspect_ratio": "16:9", "resolution": "2k"}'

Poll for the result using the returned request_id against /api/v1/predictions/{id}/result until status is completed.

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Common Questions

Frequently asked

What is FLUX 3?

FLUX 3 is Black Forest Labs' new multimodal frontier model, announced July 2026, trained jointly across image, video, and audio within a single architecture. It also extends to action prediction for robotics use cases.

Is FLUX 3 Text-to-Image available now?

FLUX 3 Image is rolling out in the coming weeks after Black Forest Labs' initial early-access launch of FLUX 3 Video and Action. Muapi will enable this endpoint as soon as general API access opens.

How is FLUX 3 different from FLUX.2?

FLUX 3 shares a unified architecture across image, video, and audio generation (Black Forest Labs' Self-Flow approach), whereas FLUX.2 is an image-only model family. This gives FLUX 3 stronger real-world coherence and physical plausibility.

Will FLUX 3 have an open-weight version?

Black Forest Labs has stated that faster, open-weight versions of FLUX 3 will follow later in 2026, continuing the same open-access approach as FLUX.1 and FLUX.2.

How do I get notified when FLUX 3 launches on Muapi?

Create a free Muapi account and API key today — the flux-3-text-to-image endpoint will activate automatically for existing users once Black Forest Labs opens general availability.

What resolutions will FLUX 3 support?

Based on Black Forest Labs' announcement and prior FLUX generations, expect support for standard aspect ratios (16:9, 9:16, 1:1, and more) at up to 4k resolution.