GPT-5.1-Codex-Max vs MiniMax M2.5

Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.

Quick Verdict

GPT-5.1-Codex-Max wins overall with a score of 77 vs 59 (18 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

Knowledge

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

95

MiniMax M2.5

70.8

98
MMLU
73
96
GPQA
72
94
SuperGPQA
70
92
OpenBookQA
68

Coding

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

94

MiniMax M2.5

65

94
HumanEval
65

Mathematics

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

97.1

MiniMax M2.5

72

99
AIME 2023
73
99
AIME 2024
75
98
AIME 2025
74
95
HMMT Feb 2023
69
97
HMMT Feb 2024
71
96
HMMT Feb 2025
70
96
BRUMO 2025
72

Reasoning

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

93

MiniMax M2.5

69

94
SimpleQA
70
92
MuSR
68

Frequently Asked Questions

Which is better, GPT-5.1-Codex-Max or MiniMax M2.5?

GPT-5.1-Codex-Max scores higher overall with 77 vs 59, a difference of 18 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.1-Codex-Max or MiniMax M2.5?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 70.8.

Which is better for coding, GPT-5.1-Codex-Max or MiniMax M2.5?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 65.

Which is better for math, GPT-5.1-Codex-Max or MiniMax M2.5?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 72.

Which is better for reasoning, GPT-5.1-Codex-Max or MiniMax M2.5?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 69.