Who Coined Vibe Coding? Andrej Karpathy’s February 2025 Origin

One tweet on a Sunday afternoon in February 2025 gave a name to a movement. Andrej Karpathy, a leading AI researcher, described how he now builds software entirely through conversation with LLMs. He called it “vibe coding.” This page traces who Karpathy is, what he said, and how the term spread from a single post to mainstream recognition.

Who is Andrej Karpathy?

Andrej Karpathy is a prominent AI researcher and engineer. He co-founded OpenAI and served as its research scientist. He later led AI at Tesla, overseeing Autopilot vision systems. Karpathy is known for making complex AI concepts accessible. His YouTube lectures on neural networks have millions of views. He returned to OpenAI briefly before focusing on independent projects. His credibility gave the term “vibe coding” immediate weight in the developer community[1].

What exactly did Karpathy say in his original tweet?

On February 2, 2025, Karpathy posted on X describing his new coding workflow. He said he “just talks to an LLM.” He asks it to build features, fix bugs, or refactor. He admitted he rarely touches the keyboard for actual code. He accepts the result if it works. He called this “vibe coding” — embracing the flow over meticulous typing[1]. He framed it for throwaway projects and weekend hacks. He did not claim it replaces serious engineering. The honesty resonated. Many developers realized they were already doing it.

How did the term “vibe coding” go viral?

The post hit a cultural nerve. Developers across X shared their own vibe coding experiences. Hacker News discussed it for days. Bloggers and YouTubers amplified the term. Within weeks, major tech outlets covered it. Fast Company explored the trend. Ars Technica analyzed its implications. The term spread beyond AI circles into broader tech culture. By late 2025, Collins Dictionary and Merriam-Webster both recognized it as a notable new word[2].

Did Karpathy invent the practice or just name it?

He named it, not invented it. Developers were already using LLMs to generate code conversationally. Copilot and ChatGPT had been enabling this for years. Karpathy’s contribution was giving it a memorable label. The word “vibe” captured the intuitive, flowing experience. He also publicly validated an approach many were hesitant to admit using. Naming a movement matters. After the tweet, tools and startups could market themselves under the “vibe coding” banner. The term created a category.

What is Karpathy’s relationship to Vibe Coding today?

Karpathy has not built a product around Vibe Coding. He continues his independent AI research. His original tweet remains the primary source for the term. He occasionally comments on the trend. He emphasizes that vibe coding is for prototyping and fun. He reminds followers that engineering rigor still matters for serious systems. His initial framing — throwaway-first, weekend-scale — still defines the category’s boundaries.