5 Wild Websites People Built with Claude Opus 5.5
Claude Opus 5.5 is not just writing code anymore. It is shipping whole websites, and people are watching. The biggest example is HackerTube, a weekend project by Andrej Karpathy that pulled 52,262 likes and 5.7M views on X after Opus 5.5 distilled 43M Hacker News comments into 6,454 videos. It was built in about two hours.
The rest of this list shows the same pattern at smaller scale. A merch portfolio made in just three prompts reached 1.1M views. A personal site redesigned through AI critique loops drew 2,179 likes. A scroll-driven floor plan that turns into a house pulled 1,414 likes and 180,905 views. An isometric landing page hero was one-shotted for a real product.
These are five real, shipped websites, each tied to a public post with public engagement numbers. Here is what people built, why it caught fire, and what is actually impressive about each one.
01
WebsiteHackerTube — The YouTube HN Keeps Recommending
by Andrej Karpathy (@karpathy)· 4.4M followers
♥ 52.3K · 5.7M views· Nov 1, 2026
The runaway leader of the list: 52,262 likes and 5.7M views on X. @karpathy was annoyed by YouTube recommendations, so he had Opus 5.5 mine 20 years of Hacker News comments and ship a login-free video browser in roughly two hours. The viral hook is the speed: Claude also handled VPS hardening and deployment. The dataset ships as a zip, so anyone can point their own Claude at it and build a variant.
“Weekend hack: HackerTube. I was annoyed with YouTube's recommendations so I had Claude filter down 43M comments over 20 years of HN to 6,454 videos that keep being recommended. *Significantly* better viewing experience, ~2 hours with Opus 5.5: https://hackertube.org/ - Excellent recs without any logins (state is kept in local browser session) - Thumbnail is a representative frame from middle of the video instead of the super duper A/B test hyper-optimized user uploads - Underlying data from the comment analysis as one zip file, point your Claude at it and ask for your own version - HackerTube Longs ✊ A bit more on the process: I use Claude Code (desktop app for Mac), Opus 5.5 on Medium effort as my default. I only talk to Claude and have it do everything, the only "manual work" I helped with in tandem was in the browser (reminiscent of MenuGen): 1) I had to create some kind of API key from Google Cloud UI to query YouTube for video metadata, 2) I booted up a VPS box for serving and 3) I bought the domain name. Once the box was up I gave Claude the IP and told it update, secure, harden, deploy and optimize the code, and it did the whole thing. Many awesome projects that would have normally taken weeks/months even can now be few-shotted for breakfast. What else are we not thinking of.”
02
WebsiteCasa Serra — Floor Plan That Builds Itself
by Samnang Aing (@SammmAing)· 1.1K followers
♥ 1.4K · 180.9K views· Oct 12, 2026
@SammmAing built Casa Serra, a site where a flat architectural floor plan rises into a 3D house as you scroll. It collected 1,414 likes and 180,905 views on X, after the creator said it had already drawn over 60K views on Threads and LinkedIn overnight. The blueprint detail is the draw: labeled rooms, dimension lines, a title block and sheet numbers. The scroll transition makes the drafting feel alive.
“This got over 60K views on Threads and LinkedIn combined overnight, which never happens to me. So here it is for X. A flat floor plan that builds itself into a house as you scroll. Built with @claudeai Opus 5.5.”
03
WebsiteSimulithic — Isometric Landing Page
by Ryan Ning (@itsnotryan)· 1.5K followers
♥ 1.1K · 51.1K views· Oct 8, 2026
@itsnotryan used Opus 5.5 to one-shot an isometric hero illustration for the Simulithic landing page, calling the model too goated at isometric object design. The post drew 1,116 likes and 51,056 views. It is the smallest audience here, but the craft is clear: a phone on a dock, floating app tiles and dashed connectors, all with consistent perspective and shading. It was made for a real shipped product, not a throwaway demo.
“one shot again by opus 5.5, this skill is too goated at isometric object design for @Simulithic’s landing page”
What this tells us: the websites that go viral with Opus 5.5 are not generic templates. They either solve a personal annoyance, as HackerTube did, or add one memorable interaction, like a floor plan that builds itself or a clothing rack you can browse. Speed is part of the story too. Three prompts, one shot and two hours show up again and again in the source posts. The common thread is taste: the creators knew exactly what they wanted, and the model closed the gap between idea and shipped site.