FLUX.1
Black Forest Labs / blackforestlabs.ai
Open source family of state-of-the-art text-to-image models from former Stable Diffusion researchers, widely adopted as the new foundation model for the AI image generation community.
Pricing
Free
Free plan
Yes
Category
Image Generation
Platforms
2
Free plan
Yes
API access
Yes
Open source
Yes
Platforms
2
What is FLUX.1?
FLUX.1 is the image generation model family from Black Forest Labs, founded in 2024 by Robin Rombach and colleagues who were core researchers behind Stable Diffusion. The release of FLUX.1 represented a significant leap in open source image generation quality, and it has been widely adopted by the image generation community as the successor to Stable Diffusion models.
The model achieves state-of-the-art image quality in the open source category, with particularly strong performance on text rendering within images, prompt adherence, and photorealism. In evaluations comparing FLUX.1 Pro to Midjourney, DALL-E 3, and Stable Diffusion 3, FLUX.1 has received strong marks for overall quality and versatility.
The model family has three variants: FLUX.1 [schnell] (fast, Apache 2.0 licensed for commercial use), FLUX.1 [dev] (high quality, non-commercial licence), and FLUX.1 [pro] (highest quality, API-only commercial access). This tiered structure allows community users, researchers, and commercial operators to choose the appropriate version.
FLUX.1 is self-hostable on consumer hardware (16GB+ VRAM recommended for full quality) and is supported in community tools including ComfyUI, InvokeAI, and Automatic1111, giving users access to the same ControlNet, LoRA, and workflow tooling available for Stable Diffusion.
For the image generation community, FLUX.1 has become the default foundation model for new fine-tuning and workflow development, replacing the SDXL and SD 1.5 models that previously dominated. Platforms like Replicate, Civitai, and fal.ai provide API access to FLUX models without local hardware.
How FLUX.1 works
FLUX.1 runs as image generation model software built around text and image workflows. Users typically start with a prompt, upload, or connected data source, and the underlying model handles the heavy lifting before returning a result you can refine or export. It's available on self-hosted and api via replicate, fal.ai, etc., with API access for teams that want to embed it into their own products.
Watch FLUX.1 in action
Recent YouTube videos cached from the backend so this page stays fast and fresh.
What makes it worth shortlisting
The capabilities that matter most for teams evaluating FLUX.1.
State-of-the-art image quality
Produces best-in-class open source image quality with particular improvements in text rendering and photorealism over previous models.
Apache 2.0 licence (schnell)
Free commercial use for the fast schnell variant, allowing production deployment without licensing fees.
LoRA fine-tuning support
Compatible with LoRA fine-tuning for style-specific model customisation, supported in ComfyUI and other community tools.
Best use cases
Who should use it
Pros
- State-of-the-art open source image quality surpassing earlier Stable Diffusion models
- Strong text rendering and prompt adherence improvements
- Apache 2.0 schnell model allows commercial self-hosted deployment
- Rapidly adopted as the community standard with extensive fine-tuning ecosystem
Cons
- Requires 16GB+ VRAM for best self-hosted quality
- dev and pro models have licence restrictions
- Less mature LoRA and fine-tuning community than Stable Diffusion 1.5 but growing rapidly
Is it worth the price?
FLUX.1 [schnell] model weights are Apache 2.0 licensed and free. FLUX.1 [dev] is available for non-commercial use. FLUX.1 [pro] is API-only via Replicate, fal.ai, and other providers from $0.003/image. Managed API pricing varies by provider.
Model
Open Source
Starting price
Free
Free trial
No
Tools like FLUX.1
Stable Diffusion 3 is Stability AI's competing foundation model. Midjourney and DALL-E 3 are proprietary alternatives with higher quality ceilings in some categories but no self-hosting. ComfyUI is the recommended UI for FLUX workflows.
FLUX.1 vs Civitai
A side-by-side look at the closest alternative in this category.
FLUX.1
Black Forest Labs
Civitai
Civitai
FLUX.1 [schnell] model weights are Apache 2.0 licensed and free. FLUX.1 [dev] is available for non-commercial use. FLUX.1 [pro] is API-only via Replicate, fal.ai, and other providers from $0.003/image. Managed API pricing varies by provider.
Free to access model downloads and community content. Civitai Buzz (credits) for image generation on the platform. Some models and features require purchased credits.
FLUX.1 [schnell] is Apache 2.0 licensed for commercial use. FLUX.1 [dev] is non-commercial. Commercial use of [pro] via API is governed by provider terms. Review each model variant's licence.
Review Civitai's content policy before accessing the platform. Adult content is gated behind age verification. Model licences vary — review the specific licence for each downloaded model.
Review model-specific licence terms. Self-hosted processing keeps data on local hardware. API providers have their own data handling policies.
Review individual model licences before commercial use. Some models have non-commercial or restricted licences. Civitai hosts varied content including adult material — review platform policies.
- State-of-the-art open source image quality surpassing earlier Stable Diffusion models
- Strong text rendering and prompt adherence improvements
- Apache 2.0 schnell model allows commercial self-hosted deployment
- Rapidly adopted as the community standard with extensive fine-tuning ecosystem
- Largest community library of open source image generation models and LoRAs
- Essential resource for self-hosted image generation users extending base model capabilities
- On-platform generation allows model testing without local hardware
- Community ratings and sample images help evaluate models before downloading
- Requires 16GB+ VRAM for best self-hosted quality
- dev and pro models have licence restrictions
- Less mature LoRA and fine-tuning community than Stable Diffusion 1.5 but growing rapidly
- Content moderation challenges given the scale and diversity of hosted content
- Adult content requires careful platform use in professional contexts
- Model quality varies significantly — requires evaluation before production use
Technical & deployment info
Key facts about model providers, platforms, and team support.
Model Provider
Black Forest Labs
Models
FLUX.1 [pro], FLUX.1 [dev], FLUX.1 [schnell]
Platforms
Self-hosted, API via Replicate, fal.ai, etc.
Deployment
Open Source, API (via partners)
Integrations
ComfyUI, InvokeAI, Replicate, fal.ai, Civitai, Hugging Face
Team Collaboration
No
Launch Year
2024
Security & privacy
Compliance signals and data-handling notes as reported by the vendor.
FLUX.1 [schnell] is Apache 2.0 licensed for commercial use. FLUX.1 [dev] is non-commercial. Commercial use of [pro] via API is governed by provider terms. Review each model variant's licence.
Review model-specific licence terms. Self-hosted processing keeps data on local hardware. API providers have their own data handling policies.
What users are saying
Verified reviews from signed-in users, stored in the backend and averaged into this tool's rating.
Sign in to rate FLUX.1 and leave a review.
No other reviews yet — be the first to share how this tool performs in practice.
Common questions about FLUX.1
Editorial Verdict
Should you use FLUX.1?
FLUX.1 is the best open source image generation model family currently available and the recommended choice for new self-hosted image generation projects replacing Stable Diffusion models.
Last verified July 24, 2026.