3D destruction physics — tornado, wrecking ball, truss bridge
Three self-contained HTML scenes, one prompt, four models. The author's verdict: only Opus 5 got all three right — houses climb the funnel and exit the top, the wall breaks where the ball lands and the rubble piles up, the bridge drops the truck into the river. Fable 5 cost twice as much and collapsed its building before the ball touched it. The clips below are the bridge scene.
"3D destruction physics — tornado, wrecking ball, truss bridge" is one prompt run by 4 models: Opus 5, Fable 5, Kimi K3 and GPT 5.6. 4 of 4 finished, on figures reported by the author.
- Models
- 4
- Completed
- 4 of 4
- Cheapest completed run
- GPT 5.6 — $0.31
Figures reported by atomic.chat. Not independently verified.
Numbers on this page were reported by the author. We did not run this comparison and cannot verify them.
Tokens and cost are the author's own figures, published in the post; we did not run this and cannot reconcile them against a harness log. The prompt above is not verbatim — the author published the task line and the three scene descriptions, not the exact string sent to each model, which is why no hash is recorded. The source is a single 2x2 split-screen video playing the three scenes in sequence; each clip here is that video's own quadrant for one model, cropped, over the same 14–22s window so the four are the same moment of the same scene. The per-scene costs burnt into that video ($0.431 + $0.508 + $0.458 for Opus 5, $0.837 + $0.914 + $1.071 for Fable 5, $0.075 + $0.140 + $0.096 for GPT 5.6, $0.169 + $0.196 + $0.185 for Kimi K3) sum to the totals recorded below.
Output
build three self-contained HTML scenes with real physics - A tornado that sucks in a whole field - A wrecking ball taking down an apartment block - An overloaded truck collapsing a truss bridge
Runs
| Model | Harness | Status | Cost | Duration | Output | Trust | Artifact |
|---|---|---|---|---|---|---|---|
| Opus 5claude-opus-5 | — | Completed | $1.40 | not measured | 56k | Reported | — |
| Fable 5fable-5 | — | Completed | $2.82 | not measured | 55k | Reported | — |
| Kimi K3kimi-k3 | — | Completed | $0.55 | not measured | 36k | Reported | — |
| GPT 5.6gpt-5-6 | — | Completed | $0.31 | not measured | 20k | Reported | — |