FLUX 3 Text to Image: 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.
Generate photorealistic images from text with FLUX 3, Black Forest Labs' new frontier model. Coming soon on Muapi — join early access, no subscription.
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.
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. |
Coming soon — early access via Black Forest Labs, general availability pricing not yet published.
FLUX 3 is not yet available on Fal.ai.
FLUX 3 is not yet available on Replicate.
* Competitor pricing is estimated based on similar model architectures and usage tiers.
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 |
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 of the output image.
1:1Target resolution of the generated image.
2kDeveloper documentation
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"}'
request_id against /api/v1/predictions/{id}/result until status is completed.Frequently asked
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.
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.
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.
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.
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.
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.