benchlm.ai

Gemini 2.5 Pro vs GPT-OSS 120B

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

Quick Verdict

Gemini 2.5 Pro wins overall with a score of 65 vs 42 (23 point difference).Gemini 2.5 Pro wins 4 out of 4 categories.

Gemini 2.5 Pro

CreatorGoogle
TypeProprietary
Context2M
Score65

GPT-OSS 120B

CreatorOpenAI
TypeOpen Weight
Context128K
Score42

Knowledge

Gemini 2.5 Pro

Gemini 2.5 Pro

81.5

GPT-OSS 120B

48.8

83
MMLU
51
83
GPQA
50
81
SuperGPQA
48
79
OpenBookQA
46

Coding

Gemini 2.5 Pro

Gemini 2.5 Pro

75

GPT-OSS 120B

43

75
HumanEval
43

Mathematics

Gemini 2.5 Pro

Gemini 2.5 Pro

83

GPT-OSS 120B

50

84
AIME 2023
51
86
AIME 2024
53
85
AIME 2025
52
80
HMMT Feb 2023
47
82
HMMT Feb 2024
49
81
HMMT Feb 2025
48
83
BRUMO 2025
50

Reasoning

Gemini 2.5 Pro

Gemini 2.5 Pro

80

GPT-OSS 120B

48

81
SimpleQA
49
79
MuSR
47

Frequently Asked Questions

Which is better, Gemini 2.5 Pro or GPT-OSS 120B?

Gemini 2.5 Pro scores higher overall with 65 vs 42, a difference of 23 points across all benchmarks.

Which is better for knowledge tasks, Gemini 2.5 Pro or GPT-OSS 120B?

Gemini 2.5 Pro leads in knowledge tasks with an average score of 81.5 vs 48.8.

Which is better for coding, Gemini 2.5 Pro or GPT-OSS 120B?

Gemini 2.5 Pro leads in coding with an average score of 75 vs 43.

Which is better for math, Gemini 2.5 Pro or GPT-OSS 120B?

Gemini 2.5 Pro leads in math with an average score of 83 vs 50.

Which is better for reasoning, Gemini 2.5 Pro or GPT-OSS 120B?

Gemini 2.5 Pro leads in reasoning with an average score of 80 vs 48.

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