Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
GPT-5.3 Codex wins overall with a score of 85 vs 35 (50 point difference).GPT-5.3 Codex wins 4 out of 4 categories.
DeepSeek-R1
41.8
GPT-5.3 Codex
96
DeepSeek-R1
36
GPT-5.3 Codex
95
DeepSeek-R1
43
GPT-5.3 Codex
97.1
DeepSeek-R1
41
GPT-5.3 Codex
94
GPT-5.3 Codex scores higher overall with 85 vs 35, a difference of 50 points across all benchmarks.
GPT-5.3 Codex leads in knowledge tasks with an average score of 96 vs 41.8.
GPT-5.3 Codex leads in coding with an average score of 95 vs 36.
GPT-5.3 Codex leads in math with an average score of 97.1 vs 43.
GPT-5.3 Codex leads in reasoning with an average score of 94 vs 41.