Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
GPT-5.3 Codex wins overall with a score of 85 vs 44 (41 point difference).GPT-5.3 Codex wins 4 out of 4 categories.
GPT-5.3 Codex
96
Moonshot v1
50.8
GPT-5.3 Codex
95
Moonshot v1
45
GPT-5.3 Codex
97.1
Moonshot v1
52
GPT-5.3 Codex
94
Moonshot v1
50
GPT-5.3 Codex scores higher overall with 85 vs 44, a difference of 41 points across all benchmarks.
GPT-5.3 Codex leads in knowledge tasks with an average score of 96 vs 50.8.
GPT-5.3 Codex leads in coding with an average score of 95 vs 45.
GPT-5.3 Codex leads in math with an average score of 97.1 vs 52.
GPT-5.3 Codex leads in reasoning with an average score of 94 vs 50.