Opus 5.5 and GPT-6 each code an engine animation that keeps running when disassembled
The author had Claude Opus 5.5 and GPT-6 Astra each write code for a four-cylinder engine animation that keeps running after being taken apart, and compared their cost and time.
THIS ENGINE KEEPS RUNNING EVEN WHEN IT'S TAKEN APART Built from code by Claude Opus 5.5 vs GPT-6 Astra Opus ( $9, ~2 h 15 min ) vs. Astra ( $12, ~1 h ) (estimated API cost) - 4 cylinders, real firing order 1-3-4-2 - camshafts turn at exactly half the crank speed - scroll to take it apart, it never stops - Opus: $9, ~2 h 15 min - Astra: $12, ~1 h (estimated API cost) honestly a tie on quality Opus was cheaper, Astra was twice as fast so you decide: top or bottom? prompt in the first comment