AI created web browser by writing 3 million lines of code in a week

An interesting experiment has taken place in the world of computer science and Artificial Intelligence (AI) where AI Designed a web browser by writing over 3 million (30 lakh) lines of code in a week. this experiment Cursor CEO of a company named Michael Trulli shared, who explained that AI took over the entire process autonomous Completely completed.

Cursor for this project OpenAI’s GPT‑5.2 Codex Model Used, which is capable of performing long and complex coding tasks. AI agents for seven consecutive days Wrote code in thousands of files while working and eventually one simple web browser prepared. browser core The rendering engine is written in Rust languagein which HTML parsing, CSS processing, layout and a custom JavaScript VM Are included.

However Truel clarified that this product Not production ready And there are many problems with it. He said it was a experimental project This was done so that it could be seen how large and complex software system AI can create on its own. current version “kind of works” That means — it can load some basic websites, but it Can’t keep up with established browsers like WebKit/Chromium.

The internet community and tech experts have commented on this experiment. mixed reactions Have given. Some people consider this a sign of the great potential of AI, while many The quality and actual usefulness of the code has been questioned. Some responses said that maintaining such a large codebase and using it in real applications is still a big challenge.

This event is AI‑assisted long lasting auto coding agents and indicates that future large software projects may AI involvement may increase more seriously — especially in design, coding, and primary construction.

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