Creative — open
Open Creative Brief
29 models built this brief single-shot. Claude Fable 5 leads at 85.7. 29 of 29 builds carry a blind human rating. 4 split the judge panel.
The exact brief every model received, joined with the shared output contractcontract ↗
# Open Creative Brief Make something worth making. That is the whole brief. No subject, no category, no required technique. You decide what to build, and the choice itself is being scored — half of this benchmark is what you thought was worth your time. ## The only rules - It must be a single self-contained HTML file, per the output contract below. - It must be **interactive**. Something the visitor does changes what happens. Not a page they read. - It must be **finished**. A small idea completed beats a large idea stubbed. - It must work offline, with no data, no accounts, and no backend. Whatever it needs, it generates. ## How to choose Do not build the obvious answer. A to-do list, a weather widget, a calculator, a pomodoro timer, a "particle background", a colour-palette generator, a markdown previewer — these are the median responses to an open prompt and they will be scored as such. Build the thing you would build if nobody were grading it. A tool that does one strange thing extremely well. A toy with physics worth poking at. An instrument. A generative system with rules that produce surprising results. A piece of interactive writing. Something genuinely useful that does not exist yet. Something that is only possible because it is software. Before you write code, decide: **why would anyone open this twice?** Build so that the answer is obvious the moment it loads. ## What is being evaluated - **The idea** — is it original, is it a real thought, would anyone want it to exist? - **The execution** — is the interaction immediately legible, does it feel good in the hand, is it finished? - **The craft** — does it look like someone with taste made it on purpose? Ambition is rewarded. Cleverness that does not survive contact with a user is not. Whatever you make, make it work perfectly on first open with no explanation needed beyond what is on screen.
- Claude Sonnet 5.5 (high) Anthropic · Oct 2026 · split panel28.081 gates18 panel0 human
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Scores are the blended final: 25% browser gates, 45% blind three-lab panel, 30% blind human rating; unrated cells redistribute the human weight. Screenshots are the gate run at 1440×900. "Run it live" loads the untouched deliverable in a sandboxed frame - bugs included. Back to the leaderboard · Compare the top two