Interface-Off: Which LLM designs the best marketing site? (www.designlanguage.xyz)

In a creative showdown, three leading language models—Claude 4.6, Gemini 3, and Codex 5.2—were tested on their ability to design a marketing website using the vibrant "Memphis" design style. The three models were given the same prompt to apply bold, chaotic visual aesthetics while adhering to core UX principles, such as usability and accessibility. Claude generated a solid foundation, while Gemini produced an impressively styled output. In contrast, Codex fell short, providing a less satisfactory design. This experiment is significant for the AI/ML community as it highlights the varying capabilities of LLMs in creative tasks, particularly in design—a realm typically dominated by human intuition and artistic sensibility. The results demonstrate that while LLMs can generate useful code and enhance productivity, their proficiency in design varies significantly based on the underlying model architecture and training. This exploration not only showcases the potential of AI in creative domains but also invites further experimentation to understand how different styles can be executed effectively by AI solutions.