What it is
Atoll Jelly is a pair of tiny atoll resorts by @vib3coded. The author gave the same prompt to Claude Opus 5.5 and GPT-6 Astra, and each built its own little island for a side-by-side comparison. The main link here is the GPT-6 Astra version, on the author's own page; the Claude Opus 5.5 version lives on a Claude sharing page, linked below. Both have water, little huts, fish and float rings, with much the same controls: a seaplane button, feed the fish, toss a float ring, three color themes, and sliders for the water's firmness, wave damping and tide. The Astra version also lets you drag the water to stir up ripples, grab and throw the float rings, and drag to turn and zoom the view. The two models made different scenes with different details, which is exactly what makes them fun to compare.
Who it's for: Anyone who likes little island and overwater-hut scenes, and anyone curious to see how two AI models handle the same job.
Before you start: Both versions open straight in the browser with no sign-in, no payment and no ads. The interface is in English. The pages carry no author credit or license; attribution and the link between the two versions come from @vib3coded's posts on X. The Opus version is hosted on a Claude sharing page (an artifact) and the Astra version on the author's Vercel page, and either stops working if the author takes it down. The scenes ask a lot of the browser's graphics; older devices and phones haven't been checked, and the pages don't give an age rating. Claude Opus 5.5 version: https://claude.ai/artifact/Kt28UAQ5RzfGBgNFX1Nh7R
Based on the game page and the author's posts on X. Not tested by AI Inspiration World.