Vibe coding in 2026: how AI is changing development and whether backend is still needed

Development is changing faster than our understanding of it — and with it, the role of familiar tools like Next.js is evolving.

How it started

In 2025, Andrej Karpathy — one of the co-founders of OpenAI — described a new way of working with code. He opened an AI editor, wrote a task in plain language, and simply accepted everything the model proposed. Without reading or checking every line. He called this “fully trusting the vibe” — vibe coding.

It sounds like the experiment of one person. But by spring 2025, interest in this term grew by 6700%. Collins Dictionary named vibe coding the word of the year.

What changed in development

Previously, an application was built piece by piece. Separate frontend — what the user sees. Separate backend — the server that processes data. Separate database. Three parts, three specialists, weeks of work.

Now, this can be described with a single text prompt — and AI will assemble everything together. The Bolt.new tool runs directly in the browser: no installation or configuration needed. Describe the application — get a working prototype.

Lovable generates a full React project with a connected database and authentication. v0.dev from Vercel creates ready-made components for Next.js based on a description or screenshot.

A separate backend server in its classic form is losing its meaning — not because the technology is bad, but because AI automatically embeds it into the application.

Next.js didn’t die — it’s just no longer written manually

There is active discussion online about the “death of Next.js.” But the numbers say otherwise. Next.js has become the foundation on which most AI-generated projects run. Server functions within Next.js replace a separate server. Vercel is building an entire line of AI tools around it.

The framework hasn’t become obsolete. It’s just that now AI generates it, rather than a developer writing it manually.

Which tools are used in 2026

Cursor — a code editor based on VS Code with built-in AI. It can work with multiple files simultaneously, read the entire project, and execute commands independently.

GitHub Copilot — the most widespread tool on the market. By the end of 2025, it had 1.8 million paid users. It works in most popular code editors.

Windsurf — a tool for working with large and complex projects. By early 2026, it was used by more than 700,000 developers.

Bolt.new — for quickly testing ideas. Runs in the browser, requires no installation. Popular among startups and people without a technical background.

Where AI helps, and where it doesn’t

AI handles typical tasks well — setting up login, standard routes, template components. Projects that used to take months are now assembled in days.

But there is an important nuance: AI-generated code often contains vulnerabilities — unprotected data, incorrect request handling. Where complex logic or non-standard architecture begins, models make mistakes.

Therefore, in the professional community, a working approach has emerged: AI writes, and the developer checks critical parts — authorization, payments, user data handling.

What’s the result

Backend didn’t die. Next.js didn’t die. The development process itself has changed: AI took over the routine, and the developer moved up a level — they now decide what to build and are responsible for what goes into production.

The barrier to entry has dropped so much that a designer or entrepreneur today can launch a working product without a development team. But the reliability of this product still depends on a human.