OpenAI
openai.com4/5 CRISP score Historical assessment - evidence method not recorded How scoring works
Design Analysis
Cleaner than Google's AI sites and more accessible than Anthropic's, though the homepage struggles to choose between consumer ChatGPT and developer API messaging on any given week.
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Cursor
Cursor's homepage shows real code in a real editor, not a glossy gradient. That choice is the single biggest differentiator from every other AI-IDE marketing site.
Anthropic
The most editorial, least gradient-y website in AI. The cream palette and serif headlines make Anthropic look like a publisher, which suits the safety-first brand.