What's the actual difference between AI-generated images and stock photos for a website?

The core difference is that AI images are generated from scratch to match a unique idea, while stock photos are pre-made and licensed, which means you'll often see the same 'unique' stock photo on three different competitors' websites. I once saw a smiling woman in a headset on a tech support page, a dentist's booking site, and a blog about remote work culture — all in the same week. That's the stock photo trap. You're paying for a license to use an image, not for exclusivity. AI image generators like Midjourney or DALL-E 3 let you type a description like 'a frustrated octopus trying to use a laptop on a sunny beach' and get a completely original image. The downside is that AI still struggles with details. Hands might have seven fingers. Text in the image is often garbled nonsense. A stock photo of a laptop will have a perfectly rendered keyboard. An AI-generated one might have a keyboard that looks like a melted chocolate bar if you zoom in. Legally, it's also a different ballgame. With a stock photo, you have a clear license from a known provider. AI image copyright is still a legal gray area in many places, which can be a problem for commercial use. For a deeper dive, see our guide on AI content copyright and legal issues. For a blog post where you need a very specific, eye-catching hero image, AI is amazing. For an 'About Us' page where you need a professional, trustworthy photo of a real office, stock (or better yet, a custom photo) is the safer bet. **Related**: Are AI-generated images copyrighted or free to use? | How do I get consistent character designs using AI image generators?