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Solar System Animation

Prompt: Create a single-file HTML/CSS animation of the Solar System against a dark background, using no JavaScript or external images. The output must feature a stationary Sun and all 8 primary planets (Mercury through Neptune) orbiting it continuously in the correct order using infinite CSS loops. Also include the Moon orbiting Earth and add labels to the planets. The design must be scalable and optimized for a 1:1 aspect ratio by default.

Models tested:
388
Total cost:
$15.02
Total time:
13h 11m
388/388

Model outputs

Shown: 20 Total: 388 Valid: 318 Invalid: 70

#152 Qwen3.8 Flash Next

medium
Cost
~$0.001
Time
36.1s
Tokens
3,285 tok

#154 Qwen3.8 27B

low
Cost
~$0.004
Time
117.5s
Tokens
8,990 tok

#156 GLM 5.1

medium
Invalid output
Cost
$0.000
Time
300.0s
Tokens
0 tok