t21: Snake game -- GPT-6.1 Sol vs Claude Opus 5.5
Build a playable Snake game in plain JavaScript on a canvas.
Opus: 118.8 s. Sol: 530.7 s. Sol took 4.5 times as long.
Opus (s)Sol (s)
Hidden tests: Opus 11 of 11, Sol 10 of 11.
Blind judge pick: Opus (clear).
"Solution A [Opus] follows the standard module import approach, keeping the codebase clean and passing all automated checks. Solution B [Sol] duplicates the entire game.js logic inside index.html to bypass local CORS restrictions, which creates maintenance overhead and caused it to fail a static analysis test."
"An excellent, robust, and complete implementation of Snake with pure logic, comprehensive tests, and a clean UI."
"An exceptionally well-crafted, robust, and polished Snake implementation with thoughtful edge-case handling, input queueing, and a clever file:// workaround."