Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
GPT-5.3 Codex wins overall with a score of 85 vs 33 (52 point difference).GPT-5.3 Codex wins 4 out of 4 categories.
GPT-5.3 Codex
96
Grok 3 [Beta]
39.8
GPT-5.3 Codex
95
Grok 3 [Beta]
34
GPT-5.3 Codex
97.1
Grok 3 [Beta]
41
GPT-5.3 Codex
94
Grok 3 [Beta]
39
GPT-5.3 Codex scores higher overall with 85 vs 33, a difference of 52 points across all benchmarks.
GPT-5.3 Codex leads in knowledge tasks with an average score of 96 vs 39.8.
GPT-5.3 Codex leads in coding with an average score of 95 vs 34.
GPT-5.3 Codex leads in math with an average score of 97.1 vs 41.
GPT-5.3 Codex leads in reasoning with an average score of 94 vs 39.