benchlm.ai

GPT-5.1-Codex-Max vs GPT-5 mini

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 68 (9 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

GPT-5 mini

CreatorOpenAI
TypeProprietary
Context128K
Score68

Knowledge

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

95

GPT-5 mini

85

98
MMLU
88
96
GPQA
86
94
SuperGPQA
84
92
OpenBookQA
82

Coding

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

94

GPT-5 mini

80

94
HumanEval
80

Mathematics

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

97.1

GPT-5 mini

89

99
AIME 2023
90
99
AIME 2024
92
98
AIME 2025
91
95
HMMT Feb 2023
86
97
HMMT Feb 2024
88
96
HMMT Feb 2025
87
96
BRUMO 2025
89

Reasoning

GPT-5.1-Codex-Max

GPT-5.1-Codex-Max

93

GPT-5 mini

83

94
SimpleQA
84
92
MuSR
82

Frequently Asked Questions

Which is better, GPT-5.1-Codex-Max or GPT-5 mini?

GPT-5.1-Codex-Max scores higher overall with 77 vs 68, a difference of 9 points across all benchmarks.

Which is better for knowledge tasks, GPT-5.1-Codex-Max or GPT-5 mini?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 85.

Which is better for coding, GPT-5.1-Codex-Max or GPT-5 mini?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 80.

Which is better for math, GPT-5.1-Codex-Max or GPT-5 mini?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 89.

Which is better for reasoning, GPT-5.1-Codex-Max or GPT-5 mini?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 83.

Related Comparisons

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