If you’ve been following the buzz in the developer world lately, you’ve probably heard the term “vibe coding.” It’s one of those phrases that sounds a bit vague until you see it in action—and then it clicks. Instead of hammering out every single line of code yourself, you tell an AI what you want, and it writes the code for you. You’re steering the ship with ideas and intent, while the AI handles the heavy lifting.
This shift is powered by two things:
- An IDE—short for Integrated Development Environment. This is the software where developers write, test, and debug their code.
- An LLM (Large Language Model)—the AI brain inside the IDE that can actually understand your instructions and turn them into working code.
The Two Big Names: Cursor and Windsurf
While there are plenty of tools dabbling in vibe coding, two players dominate in funding, features, and adoption:
Cursor
Built as a fork of VS Code by a company called Anysphere, Cursor focuses on deep code understanding. It’s known for smooth, AI-driven autocompletion, an agent called “Composer” that can manage complex workflows, and strong debugging and refactoring features. Developers who work with large, messy codebases love it. Cursor has also hit unicorn status—with a $10 billion valuation—and makes around $100 million annually.
Windsurf
Windsurf, formerly known as Codeium, also started as a VS Code fork but aims for a more visual, creative vibe. Its “Cascade” agent handles multi-file changes, and its live UI previews make it great for front-end developers and rapid prototyping. Earlier this year, OpenAI tried to buy Windsurf for about $3 billion—but that deal fell through, and Google swooped in to license the tech instead.
In short: Cursor feels like a precision instrument for deep work, while Windsurf leans toward fast, visual iteration. Each has its fans, and each plays to its strengths.
Why LLMs Matter—and Why Claude Has Been the Go-To
An IDE without an AI model is just… an editor. The real magic comes from the LLM inside it. For the past couple of years, both Cursor and Windsurf have leaned heavily on Anthropic’s Claude, particularly the Claude Sonnet models, because they’re fast, handle huge chunks of code, and reason well.
Enter GPT-5—and Cursor’s Quick Move
Then came yesterday’s big news: OpenAI released GPT-5, their most advanced coding model yet. At the live launch event, Cursor’s co-founder Michael Truell appeared alongside OpenAI’s Greg Brockman to announce something huge—GPT-5 is already live inside Cursor. That means Cursor users can now pick between Claude and GPT-5, depending on the task.
The Bigger Question: Where Is OpenAI Going With This?
Here’s where it gets interesting. GPT-5 is also now available inside ChatGPT, which means anyone can try vibe coding without a special IDE. Just open ChatGPT, ask for code, and you’re off to the races. Of course, ChatGPT today isn’t a full IDE—it’s missing integrated debugging, live previews, and all those developer-focused niceties—but it’s not hard to imagine OpenAI closing that gap.
Remember, OpenAI already tried to buy Windsurf. If that had happened, it could have been a real shake-up for Cursor—imagine ChatGPT suddenly getting Windsurf’s front-end polish and deep integration features. And while the deal didn’t work out, what’s stopping OpenAI from building their own IDE or buying another platform?
Could Cursor and Windsurf Be Left in the Dust?
Right now, both Cursor and Windsurf still have the upper hand for serious developers. They’re purpose-built, they have years of refinement, and they’re tightly integrated with developer workflows. ChatGPT with GPT-5, as good as it is, still feels like a generalist tool trying to play in a specialist’s arena.
But the question lingers: if OpenAI decides to fully step into the IDE space—either by building something inside ChatGPT or snapping up another company—will Cursor and Windsurf be able to hold their ground? Or will this turn into another case of a tech giant eating the market it helped create?
For now, the vibe-coding crown still belongs to Cursor and Windsurf. But in the near future, if ChatGPT gets broader, the winds might just be shifting.