AI image-generation tools are improving rapidly. Every week, there is a new tool on the market. According to Global Market Insights, the AI image generator market will reach approximately $944 million by 2032, compared to $213.8 million in 2022, growing at a compound annual growth rate of 16.5%. These tools are capable of creating photo-realistic and creative images.

Two of the most popular and powerful AI image generation tools on the market today are Midjourney and Stable Diffusion. Both tools have unique strengths and weaknesses, making them suitable for different use cases.

In this article, we will look at Midjourney vs Stable Diffusion in detail, making it easier for AI artists and designers to choose the right tool.

Midjourney vs Stable Diffusion: What is Stable Diffusion?

Released by Stability AI, Stable Diffusion is one of the best AI image generators on the market. It can create photorealistic images with incredible precision and detail, outperforming previous GAN-based image generation models.

Image Generated using Stable Diffusion

Stable Diffusion is built on top of the latent diffusion model and U-Net architecture, as illustrated below. The diffusion model converts the training data image from high-dimensional pixel space to a latent space containing a low-dimensional representation of pixel space while keeping its characteristics intact.

During conversion, the diffusion model systematically introduces Gaussian noise into the training image. This is referred to as the diffusion process. As the original data becomes progressively noisier, the model undergoes a learning process to effectively reverse this noise using the U-Net architecture, referred to as denoising.

The denoising operation iteratively recreates the finer details of the original image. Following the completion of the training phase, the resulting diffusion model can be utilized to generate novel image data simply by guiding randomly sampled noise through the learned denoising mechanism.

An Overview of Stable Diffusion Architecture

Midjourney vs Stable Diffusion: What is Midjourney?

Midjourney is one of the best AI art generators on the market. It was created by David Holz and his team, who call it an “engine for the imagination.” It was first announced in 2021 and has since become one of the most sought-after AI image-generation tools on the market.

In 2023, Midjourney opened up its waitlist to the public. It is accessible via a discord server with over 15 million users as of today.

Midjourney is a closed-source model, so its internal architecture is publicly unavailable. However, online discussion forums suggest that it is a combination of diffusion models (mainly a variant of Stable Diffusion) and large language models (LLMs) to process text prompts and generate images. It is trained on a huge dataset of text and images. The model operates at different levels of detail, from coarse to fine, resulting in greater realism.

Midjourney vs Stable Diffusion: Strengths & Weaknesses of Stable Diffusion

Stable Diffusion Tool Screenshot

Strengths of Stable Diffusion

• Photo Restoration: Effective at restoring and repairing damaged photos.
• Image Editing: Offers various image editing features, like brightness, contrast, color saturation adjustments, and image enhancement.
• Open Source: Accessible to researchers and developers as an open-source model.
• Cost-effective: Free to use, with potential GPU or cloud computing deployment costs.
• Accessibility: A deployed Stable Diffusion model is offered by Stability.ai as part of their Clipdrop tool kit, starting at $9 per month, with additional APIs in high-tier plans.

Limitations of Stable Diffusion

• High Computational Demands: Requires powerful graphics cards like NVIDIA RTX 3080 for optimal results and high-resolution images.
• Technical Complexity: More challenging to set up and operate compared to alternatives, demanding technical knowledge. Also, fine-tuning stable diffusion for domain-specific tasks requires expertise and time-intensive experimentation.
• Speed: It is slightly slower than Midjourney, especially when using higher-quality settings.

Midjourney vs Stable Diffusion: Strengths & Weaknesses of Midjourney

Midjourney Platform Screenshot

Strengths of Midjourney

• Generating Artistic Images: Midjourney is well-suited for generating creative and artistic images, such as concept art, digital painting, illustrations, and style transfer.
• Flexibility: Midjourney offers a variety of filters that allow AI artists to customize their images. For example, users can try different variation modes to change the color, composition, and number of elements in an image.
• Active Community: Midjourney has an active discord community where users share their work and tips to help each other.
• Speed: Midjourney can generate images quicker than Stable Diffusion in “Fast” mode.

Limitations of Midjourney

• Closed source: Midjourney is a closed-source model. This makes it difficult for researchers and developers to improve or customize the model for specific needs.
• Accessibility: It is only available using the Discord server.
• Costly: Midjourney is a paid service, starting at $10 per month and going up to $120 monthly for the Mega Plan.

Comparison of Stable Diffusion vs Midjourney

Model	Stable Diffusion	Midjourney
Availability	Open Source	Proprietary
Accessibility	Available directly via the web and Android and IOS apps.	Requires a Discord account.
Speed	Slightly slower	Offers a fast mode at a higher price.
Customization	Different style filters are available.	Variations for style, zoom, and orientation are available.
Ease of use	Depends on specific implementation and integration with AI frameworks or other tools like Photoshop and Figma. It may require coding or technical expertise.	Currently, it is only available via Discord.
Pricing	A free and open-source version is available. Stability.ai offers a paid deployed version as well.	A paid subscription starting at $10 per month.

AI Image Generators: Concluding Thoughts

Generative AI is growing rapidly, and new models are being released more frequently than before. AI-generated images are gaining traction among AI artists and designers. With so many AI art generators available, choosing the best one would depend on your specific needs and preferences. Moreover, tech companies are trying to make AI image generators mainstream with better protections against misuse.

If you want to learn more about AI image generation tools, we have curated a list of top AI image generators. Visit unite.ai for more AI-related content.