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Task brief
Create a visually engaging animated history of dinosaurs in under one minute using JavaScript. Cover their emergence in the Triassic, the Jurassic giants, Cretaceous diversity, and the end-Cretaceous extinction, with clear English labels, a timeline, recognizable moving dinosaurs and smooth scene transitions. Deliver a playable HTML artifact with play/pause and replay controls. Source: https://x.com/claudeai/status/2104674993212702803 (273K views, 684 likes observed 2026-10-01). Adapted reproduction brief based on the public post; not the original verbatim prompt. Compare the current Evals-selected models, not the original model versions.
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Build a polished playable Sonic-style 3D platform game for the browser. Include a fast character, rings to collect, ramps, jumping, hazards, checkpoints, score and restart. Make speed and platforming feel satisfying. Deliver a working browser artifact.
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