I challenged myself to recreate the core experience of Perplexity.ai, the $9B “Google-killer", on a Sunday, using OpenAI's latest web search capabilities and a light frontend.<p>The result is: notperplexity.ai<p>Under the hood, it wraps OpenAI’s new Responses API with the web-search tool. It’s sometimes useful and mostly an excuse to see how far the primitives have come. It does beg the question of how point solutions like Perplexity can continue to grow.