benchlm.ai

Gemini 1.5 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 54 (23 point difference).GPT-5.1-Codex-Max wins 4 out of 4 categories.

Gemini 1.5 Pro

CreatorGoogle
TypeProprietary
Context2M
Score54

GPT-5.1-Codex-Max

CreatorOpenAI
TypeProprietary
Context400K
Score77

Knowledge

GPT-5.1-Codex-Max

Gemini 1.5 Pro

62.5

GPT-5.1-Codex-Max

95

64
MMLU
98
64
GPQA
96
62
SuperGPQA
94
60
OpenBookQA
92

Coding

GPT-5.1-Codex-Max

Gemini 1.5 Pro

56

GPT-5.1-Codex-Max

94

56
HumanEval
94

Mathematics

GPT-5.1-Codex-Max

Gemini 1.5 Pro

63

GPT-5.1-Codex-Max

97.1

64
AIME 2023
99
66
AIME 2024
99
65
AIME 2025
98
60
HMMT Feb 2023
95
62
HMMT Feb 2024
97
61
HMMT Feb 2025
96
63
BRUMO 2025
96

Reasoning

GPT-5.1-Codex-Max

Gemini 1.5 Pro

61

GPT-5.1-Codex-Max

93

62
SimpleQA
94
60
MuSR
92

Frequently Asked Questions

Which is better, Gemini 1.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max scores higher overall with 77 vs 54, a difference of 23 points across all benchmarks.

Which is better for knowledge tasks, Gemini 1.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in knowledge tasks with an average score of 95 vs 62.5.

Which is better for coding, Gemini 1.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in coding with an average score of 94 vs 56.

Which is better for math, Gemini 1.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in math with an average score of 97.1 vs 63.

Which is better for reasoning, Gemini 1.5 Pro or GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max leads in reasoning with an average score of 93 vs 61.

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