Toys & Experiments
The test
A one-shot game-building benchmark comparing Claude Opus 5, Opus 4.8, and Fable 5.
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Description
A structured evaluation of Anthropic's Opus 5, Opus 4.8, and Fable 5 models, tasking them with building four distinct games: a physics sandbox, Tetris, Breakout, and a raindrop simulation. Each model attempted the builds with identical one-shot prompts and effort settings, with results scored for logic, playability, and cost-efficiency.
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