Fable 5 absolutely crushed the HTML5 physics contest, but cost 6x more than Opus 4.8 and 39× more than GLM 5.2 in that test.
Test was done on atomic[.]chat, a desktop app that runs LLMs locally.
The test asked 4 models to generate self-contained canvas demos with believable motion and collisions.
The scenes were not simple animations because every crash needed gravity, force, timing, and contact handling.
Outputs: • Fable 5: 62,158 tokens, $3.12 • GPT 5.5: 37,753 tokens, $1.14 • Opus 4.8: 22,280 tokens, $0.56 • GLM 5.2: 36,246 tokens, $0.08