Opus 5 vs Fable 5: same 3D Flappy Bird prompt, 250k vs 130k tokens
TAbrodi · x · 2026-07-26
A user compared two models on the same task: building a 3D Flappy Bird game from an identical prompt.
According to the post, Opus 5 took about 250k tokens and 1 hour, while Fable 5 used about 130k tokens and finished in half the time. Opus produced extra controls such as volume adjustment and three graphics presets, and its environment changed dynamically during play. Fable was simpler, with fewer options and a more static visual experience.
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