Why do vibe coded websites look the same?

A vibe coded website is a site built by describing what you want to an AI coding tool such as Cursor, Claude Code, Lovable, v0, Bolt or Replit, and accepting most of the generated code rather than hand-writing it. The term is usually descriptive rather than an insult. Plenty of good, working, profitable sites are built this way, and the tooling keeps getting better at it.

Ask almost any model for a landing page and the same artifact tends to arrive:

• A centered hero with a gradient behind it, very often violet through indigo, because that is the default in the most widely copied starter templates.
• Three feature cards in a row, rounded, with a small icon at the top of each.
• Glassmorphism, soft shadows, and a faint grid or noise texture.
• A pricing table with three tiers and the middle one highlighted.
• Copy in imperative pairs: build faster, ship smarter, scale effortlessly.

None of that is wrong on its own. The problem is arithmetic. A visitor who has seen ten of these reads the eleventh as interchangeable, and interchangeable is the one thing a landing page cannot afford to be.

The cause is not laziness in the tool. It is that the request is usually underspecified. “Make me a landing page that looks good” contains no constraint, so the model optimises for the safest possible output, and the safest output is the average of everything it has seen. Averages are, definitionally, unremarkable.

The same mechanism produces the copy. Asked for a headline with no information about who is reading it, a model writes the headline that is least likely to be wrong for anyone, which is also the headline least likely to mean anything to someone in particular.

The design half is fixed in the tool you built with, not with another product. What reliably works is giving the model something specific to react to instead of asking it to decide:

• Give it a real reference. Name a site whose feel you want and say what specifically you want from it.
• Write constraints down and keep them in the repo, so every later prompt inherits them. A short file that says no gradients, one accent colour, generous whitespace, real screenshots instead of abstract illustration, does more than any single prompt.
• Replace the default typeface. It is one line and it changes the read more than most layout work.
• Break the three-card grid. Two columns, or a list, or one large example, all read as deliberate.
• Show the actual product. Real screenshots beat generated illustration, because a screenshot is evidence and an illustration is decoration.

IntentGrid does none of this. It leaves your CSS, your layout and your components alone; in the demo it adds four things on top, a welcome strip, a personalized overlay, a highlight on your headline and a small IntentGrid badge. Claiming this product fixes how your site looks would be the easiest way to sell this page and it would be false.

Rewriting your headline once only moves you to a different generic page. You will spend an afternoon on it, feel productive, and end up with another single sentence aimed at an average visitor who does not exist.

The durable difference is that the page is not the same sentence for everyone. Someone arriving from a technical forum at eleven at night on a laptop wants the substance. Someone who tapped a link in a shared video on a phone wants the thirty-second version. Someone who clicked a paid ad wants the page to answer the promise that ad made. Those are three different pages, and maintaining three pages by hand is more work than any solo founder will keep doing.

That is the half IntentGrid changes. It reads how the visitor arrived and rewrites the words for them, from the page you already ship. Design untouched, prices untouched, claims untouched. How it works has the mechanism in full.

Sometimes, and the tell is almost never the code. It is the default gradient, the stock three-card section, and copy that could belong to any product in the category. There is no reliable detector that inspects a site and announces it was AI-generated, and the tools that claim to do it are guessing from exactly those surface patterns.

Which is the encouraging part: the signal is fixable. Change the defaults and say something specific, and the question stops coming up. For what it is worth, being built with AI is not the problem anyone actually has with these sites. Being indistinguishable is.