Which AI Made This?

A comparison of how different AI models approach UI design, with and without Anthropic's frontend design skill enabled.

Prompt · I want you to design the landing page for a note-taking application as essentially a second brain. You should design five iterations and each of them should be accessible within the slash one, slash two, slash three like pages directory. And then you should add a little button that lets me switch between them easily.

This site was designed by Composer 2.0 LOL

With Design Skill

Composer 2.0 preview

With Design Skill

Composer 2.0

Gemini 3.1 Pro preview

With Design Skill

Gemini 3.1 Pro

GPT 5.5 low preview

With Design Skill

GPT 5.5 low

GPT 5.5 high preview

With Design Skill

GPT 5.5 high

Kimi K 2.6 preview

With Design Skill

Kimi K 2.6

Opus 4.7 preview

With Design Skill

Opus 4.7

GLM 5.1 preview

With Design Skill

GLM 5.1

With UI SH Skill

Composer 2.0 preview

With UI SH Skill

Composer 2.0

GPT 5.5 low preview

With UI SH Skill

GPT 5.5 low

GPT 5.5 high preview

With UI SH Skill

GPT 5.5 high

Opus 4.7 preview

With UI SH Skill

Opus 4.7

Without Design Skill

Composer 2.0 preview

Without Design Skill

Composer 2.0

Gemini 3.1 Pro preview

Without Design Skill

Gemini 3.1 Pro

GPT 5.5 low preview

Without Design Skill

GPT 5.5 low

GPT 5.5 high preview

Without Design Skill

GPT 5.5 high

Kimi K 2.6 preview

Without Design Skill

Kimi K 2.6

Opus 4.7 preview

Without Design Skill

Opus 4.7

GLM 5.1 preview

Without Design Skill

GLM 5.1

GPT-5.4 preview

With Uncodexify skill

GPT-5.4