Side-by-Side Comparison · 2026

Flux vs Stable Diffusion: Full Comparison (2026)

Flux is flux 1.1 pro ultra - state-of-the-art image generation by black forest labs. Stable Diffusion is open-source image generation you can run locally. Use the breakdown below to find the right fit for your needs.

Flux

Black Forest Labs

Freemium
vs

Stable Diffusion

Stability AI

Free
This page presents factual information sourced from publicly available vendor documentation and product pages. AIHub does not endorse either product. The right tool depends on your specific use case, team, and requirements — we recommend evaluating both tools directly before making a decision.

Side-by-Side Overview

Pricing Model
Flux: FreemiumStable Diffusion: Free
API Access
Flux: Not availableStable Diffusion: Available
Platforms
Flux: WebStable Diffusion: Local (Windows/Mac/Linux), DreamStudio (web), Automatic1111 WebUI, ComfyUI, Replicate API, HuggingFace Spaces
Integrations
Flux: —Stable Diffusion: 6 integrations
Vendor
Flux: Black Forest LabsStable Diffusion: Stability AI
Category
Flux: Image GenerationStable Diffusion: Image Generation
Launch
Flux: —Stable Diffusion: Aug 22, 2022
Models
Flux: FLUX 1.1 Pro Ultra (4MP), FLUX 1.1 ProStable Diffusion: SD 3.5 Large (8B params), SD 3.5 Large Turbo

About Flux

Flux is a family of text-to-image models by Black Forest Labs (founded by Stable Diffusion creators). FLUX 1.1 Pro Ultra (4MP resolution) and FLUX.1 Pro set the standard for photorealism and prompt accuracy. [schnell] open-weights variant runs locally.

Designed For

  • Photorealistic generation
  • Commercial photography
  • Fine-tuning
  • API integration
Full Flux details

About Stable Diffusion

Stable Diffusion is an open-source latent diffusion model for image generation. Can be run locally on consumer hardware, with a massive ecosystem of fine-tuned models and ControlNet extensions.

Designed For

  • Local image generation
  • Custom model fine-tuning
  • Batch generation
  • Research
Full Stable Diffusion details

Strengths & Limitations

Flux

Strengths

  • FLUX 1.1 Pro Ultra: 4MP native resolution
  • Best prompt accuracy of any model
  • Fast variants available
  • Open weights [schnell]
  • Video generation (FLUX Video, 2025)

Limitations

  • Pro version costs credits
  • Ecosystem still growing vs Midjourney

Stable Diffusion

Strengths

  • Free and open-source
  • Runs locally
  • Huge model ecosystem

Limitations

  • Technical setup required
  • Hardware requirements
  • Variable quality

Frequently Asked Questions

What is the difference between Flux and Stable Diffusion?

Flux is flux 1.1 pro ultra - state-of-the-art image generation by black forest labs, while Stable Diffusion is open-source image generation you can run locally. Flux is designed for Image Generation; Stable Diffusion is designed for Developers, Artists wanting control. The right fit depends on your specific requirements.

How do the pricing models compare?

Flux is available under a Freemium model. Stable Diffusion is available under a Free model. Stable Diffusion's entry tier starts at Free. Always verify pricing on each vendor's official website as it may change.

What integrations does each tool support?

Flux integrates with various tools. Stable Diffusion integrates with ComfyUI, A1111 (1000+ extensions), Replicate, Stability API. Check each vendor's documentation for the full and current list.

How do I choose between Flux and Stable Diffusion?

Consider your team's technical requirements, budget, existing tooling, and use case before deciding. We recommend signing up for free trials or demos of both tools where available, and consulting each vendor's documentation. AIHub provides this comparison for informational purposes only.