Fable 5 写物理仿真比 Opus 4.8 更扎实，尤其水粒子效果更真实，虽然贵了点但值得一试。
Fable 5 模型在三个真实物理模拟任务（混沌双摆、高尔顿板、WCSPH 旋转桶中水）中生成的 HTML5 仿真效果优于 Opus 4.8。水模拟中，Fable 5 生成的水体更连续稳定，而 Opus 4.8 在器壁附近出现较大空隙、粒子散落且流体不稳定。Fable 5 的生成成本为 3.35 美元（68.7k tokens，耗时 14 分 47 秒），Opus 4.8 为 0.93 美元（38.9k tokens，耗时 8 分 10 秒）。
New Fable 5 beats Opus 4.8 on real world physics s…
New Fable 5 beats Opus 4.8 on real world physics simulations
We gave both models the same three prompts and asked them to build self contained HTML5 sims with real physics and no libraries:
1. Chaotic double pendulum 2. Galton board 3. Water in a spinning drum (WCSPH)
Generation cost Fable 5: $3.35 on 68.7k tokens, time 14m 47s Opus 4.8: $0.93 on 38.9k tokens, time 8m 10s
Fable clearly did better on the water simulation, producing a much more solid and continuous body of water. Opus left larger gaps near the walls, scattered particles around the scene, and struggled to keep the fluid stable.