Gemini 1.5 Pro vs GPT-4.1 nano

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

Gemini 1.5 Pro is clearly ahead on the aggregate, 55 to 23. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Gemini 1.5 Pro's sharpest advantage is in mathematics, where it averages 64.3 against 9.8. The single biggest benchmark swing on the page is AIME 2024, 66 to 9.8. GPT-4.1 nano does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.

Gemini 1.5 Pro gives you the larger context window at 2M, compared with 1M for GPT-4.1 nano.

Quick Verdict

Pick Gemini 1.5 Pro if you want the stronger benchmark profile. GPT-4.1 nano only becomes the better choice if knowledge is the priority.

Knowledge

GPT-4.1 nano

Gemini 1.5 Pro

51.3

GPT-4.1 nano

65.2

64
MMLU
80.1
64
GPQA
50.3
62
SuperGPQA
-
60
OpenBookQA
-
57
MMLU-Pro
-
1
HLE
-

Coding

Gemini 1.5 Pro
56
HumanEval
-
5
SWE-bench Verified
-
22
LiveCodeBench
-

Mathematics

Gemini 1.5 Pro

Gemini 1.5 Pro

64.3

GPT-4.1 nano

9.8

64
AIME 2023
-
66
AIME 2024
9.8
65
AIME 2025
-
60
HMMT Feb 2023
-
62
HMMT Feb 2024
-
61
HMMT Feb 2025
-
63
BRUMO 2025
-
73
MATH-500
-

Reasoning

Gemini 1.5 Pro
62
SimpleQA
-
60
MuSR
-
74
BBH
-

Instruction Following

GPT-4.1 nano

Gemini 1.5 Pro

77

GPT-4.1 nano

83.2

77
IFEval
83.2

Multilingual

Gemini 1.5 Pro
76
MGSM
-

Frequently Asked Questions

Which is better, Gemini 1.5 Pro or GPT-4.1 nano?

Gemini 1.5 Pro is ahead overall, 55 to 23. The biggest single separator in this matchup is AIME 2024, where the scores are 66 and 9.8.

Which is better for knowledge tasks, Gemini 1.5 Pro or GPT-4.1 nano?

GPT-4.1 nano has the edge for knowledge tasks in this comparison, averaging 65.2 versus 51.3. Inside this category, MMLU is the benchmark that creates the most daylight between them.

Which is better for math, Gemini 1.5 Pro or GPT-4.1 nano?

Gemini 1.5 Pro has the edge for math in this comparison, averaging 64.3 versus 9.8. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.

Which is better for instruction following, Gemini 1.5 Pro or GPT-4.1 nano?

GPT-4.1 nano has the edge for instruction following in this comparison, averaging 83.2 versus 77. Inside this category, IFEval is the benchmark that creates the most daylight between them.

Last updated: March 9, 2026

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