Gemini 3 vs. Claude Opus 4.5 vs. GPT-5.1 Codex: Which AI model is the best designer?

Welcome back to How I AI. I'm Claire Vo, product leader and AI obsessive here on a mission to help you build better with these new tools. Today, I have a really fun mini episode where I'm gonna answer the question on everyone's mind. Which of these new models is actually the best designer? I'm gonna take a page on my site that I don't think is particularly well designed and have Gemini three, Opus four five, and Codex five one duke it out and see which one can redesign my page better one shot. Let's get to it. This episode is brought to you by Lovable. If you've ever had an idea for an app but didn't know where to start, Lovable is for you. Lovable lets you build working apps and websites by simply chatting with AI. Then you can customize it, add automations, and deploy it to a live domain. It's perfect for marketers spinning up tools, product managers prototyping new ideas, or founders launching their next business. Unlike no code tools, Lovable isn't about static pages. It builds full apps with real functionality, and it's fast. What used to take weeks, months, or even years, you can now do over the weekend. So if you've been sitting on an idea, now's the time to bring it to life. Get started for free at lovable.dev. That's lovable.dev. If you've been paying attention in the last couple weeks, it seems like every single model provider has released a brand new coding model. And what I heard the most from people is, sure, they're fast and sure, they're great and sure, they're beating benchmarks, but they are all really good at design. If you've been on x or social media, you've probably seen these beautifully designed landing pages, apps, and user experience components generated using Gemini three or Opus four five or even codex five one. And I thought, let's put these side by side and actually see which one's better at redesigning an existing page. I think it's easy to one shot something and make it look beautiful, especially if you're a great prompter and know exactly what to say as a designer. But if you have an existing site and you wanna make it better, who's your trusted design engineer? Which of these models is really gonna do the trick? And I'm gonna show you what I think today in a couple minutes on which of these models is the better designer or redesigner of a page that I don't think is really great. So this is the chat PRD blog. It is not very good. I don't think this is a very beautiful site. It's not my favorite. I think it could be a lot better. And it could be a lot better from a functional perspective, but it can also be a lot better from a design perspective. And, you know, if I had a team, which I have a little small one, but if …