The Best Model For Frontend Design Is...

A comparison of frontier AI models (Claude Opus 4.5, GPT-5.2, Gemini 3 Pro) for frontend design generation reveals that Claude Opus 4.5 with the "frontend design skill" markdown file produces the best results. While Gemini 3 Pro can generate impressive initial designs, it struggles with iteration and following instructions. The frontend design skill—a markdown file that steers models away from generic AI aesthetics (purple gradients, Roboto fonts)—dramatically improves Opus's design output. The skill works by providing detailed guidance on avoiding clichés and making intentional design choices. Testing shows Opus with the skill creates more malleable, iterative designs compared to Gemini's template-based approach, despite Gemini occasionally producing strong individual outputs.