Show HN: OpenGravity – A zero-install, BYOK vanilla JS clone of Antigravity

A student just dropped OpenGravity, a free, browser-based copy of Google’s Antigravity coding workspace, and the community reaction was half applause, half roast session. The pitch is simple enough for non-experts: it lets you open a coding tool in your browser, bring your own paid AI key, and start building without installing a giant app first. The creator openly admits it’s an alpha, a rough early version, and says they built it after getting fed up with Google’s rate limits. That alone lit up the thread, because plenty of people clearly have their own baggage with the original product.

The strongest vibe in the comments? People love the idea, but they absolutely cannot resist nitpicking it. One of the first drive-by jokes was that it should have been called “ZeroGravity,” which is exactly the kind of naming debate the internet will happily treat like a constitutional crisis. Others immediately started asking whether it should work with monthly plans, whether it’s really a fresh build or just borrowing the look of existing tools like VSCode, and whether this whole style of AI helper is even trustworthy in the first place.

That last part brought the real drama. One commenter flat-out said they don’t like Antigravity because AI mistakes can delete important code and lose track of a project when the session reloads. Ouch. Meanwhile, the creator’s late-night message about needing sleep because of GCSE exams made the whole thing feel even more chaotic and charming: the front page is cheering, the critics are circling, and the developer is basically saying, “Thanks, but I have school in the morning.”