benchlm.ai

Gemini 2.5 Pro vs GPT-5.1-Codex-Max

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 65 (12 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

Gemini 2.5 Pro

CreatorGoogle
TypeProprietary
Context2M
Score65

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

Gemini 2.5 Pro

81.5

GPT-5.1-Codex-Max

95

83
MMLU
98
83
GPQA
96
81
SuperGPQA
94
79
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

Gemini 2.5 Pro

75

GPT-5.1-Codex-Max

94

75
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

Gemini 2.5 Pro

83

GPT-5.1-Codex-Max

97.1

84
AIME 2023
99
86
AIME 2024
99
85
AIME 2025
98
80
HMMT Feb 2023
95
82
HMMT Feb 2024
97
81
HMMT Feb 2025
96
83
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

Gemini 2.5 Pro

80

GPT-5.1-Codex-Max

93

81
SimpleQA
94
79
MuSR
92

Frequently Asked Questions

Which is better, Gemini 2.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max scores higher overall with 77 vs 65, a difference of 12 points across all benchmarks.

Which is better for knowledge tasks, Gemini 2.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 81.5.

Which is better for coding, Gemini 2.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 75.

Which is better for math, Gemini 2.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 83.

Which is better for reasoning, Gemini 2.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 80.

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