We Asked GPT-5.5 and Claude Opus 4.7 to Design 5 UIs

We Asked GPT-5.5 and Claude Opus 4.7 to Design 5 UIsDarkoApr 27, 20261513ShareBoth OpenAI and Anthropic shipped their frontier coding models this month: GPT-5.5 on April 23, 2026, and Claude Opus 4.7 a week earlier on April 16.Two days after the GPT-5.5 launch, Sam Altman tweeted this:we still get looksmaxxed on frontend a little but we IQmog hard nowFor those of us who don’t speak fluent Gen Z, that translates to: GPT-5.5 has the brains but Claude still has the taste. That “a little” is doing a lot of work in that sentence, and we wanted to see what it actually looks like in practice.We gave both GPT-5.5 and Opus 4.7 the same five UI design prompts (a SaaS landing page, an analytics dashboard, a settings page, a sign-up screen, and a pricing page), and asked each to produce a single…

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